Laboratory Chemicals

5 Laboratory Chemicals Each chemical is followed by an alphabetical list of manufacturers or suppliers. Listings of this section begin on page 283

Laboratory Chemicals

ABSORBENTS chromatography Achem Div. Alltech Associates, Inc. Analabs, Inc. Analtech, Inc. Analytical Instrument Development, Inc. Antek Instruments, Inc. Apache Chemicals, Inc. J. T. Baker Chemical Co. Barnebey-Cheney Co. Beckman Instruments, Inc. Bio-Cal Instrument Co. Bio-Rad Laboratories Brinkmann Instruments, Inc. Burrell Corp. Calbiochem Camag, Inc. Chemical Research Services, Inc. Coast Engineering Laboratory Cyclo Chemical DOHRMANN Div. Envirotech Corp. Durrum Chemical Corp. Dynalab Corp. Eagle-Picher Industries, Inc. EM Laboratories, Inc. Engelhard Minerals & Chemicals Corp., Minerals & Chemicals Div. Fisher Scientific Co. Floridin Co. The Fluorocarbon Co. FMC Corp., American Viscose Div. Gallard-Schlesinger Chemical Mfg. Corp. General Biochemicals W. R. Grace & Co. Helena Laboratories lonac Chemical Co. Johns-Manville Products Corp. Kensington Scientific Corp. Lachat Chemicals, Inc. LaPine Scientific Co. Luminon, Inc. Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Merck Chemical MG Scientific Gases Miles Labs, Inc., Research Div. (III.) MISCO Scientific Nuclear-Chicago Nutritional Biochemicals Perco Supplies Perkin-Elmer Corp. Perkin-Elmer, Ltd. Pharmacia Fine Chemicals, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Polysciences, Inc. Precision Sampling Corp. Prolabo Quantum Industries H. Reeve Angel & Co., Inc. Regis Chemical Co. Reliable Chemical Co. Rhodia, Inc. Schleicher & Schuell, Inc. Scientific Manufacturing Industries The Separations Group Sigma Chemical Co. Supelco, Inc. Technicon Instruments Corp. Varian Aerograph VWR Scientific Waters Associates Inc.

electrophoresis Analabs, Inc. J. T. Baker Chemical Co. Bio-Rad Laboratories Brinkmann Instruments, Inc. Camag, Inc. E-C Apparatus Fisher Scientific Co. Gelman Instrument Co. Helena Laboratories Hyland Isolab, Inc. LaPine Scientific Co.

LABORATORY GUIDE

M ISCO Scientific Nutritional Biochemicals ORTEC Incorporated Phipps & Bird, Inc. Polysciences, Inc. Quantum Industries H. Reeve Angel & Co., Inc. Reliable Chemical Co. Schleicher & Schuell, Inc. VWR Scientific

filtration Aluminum Company of America Barnebey-Cheney Co. Bio-Rad Laboratories Brinkmann Instruments, Inc. Calbiochem Coast Engineering Laboratory Eagle-Picher Industries, Inc. Engelhard Minerals & Chemicals Corp., Minerals & Chemicals Div. Floridin Co. Gelman Instrument Co. Johns-Manville Products Corp. LaPine Scientific Co. Ν. Β. NewcombCo., Inc. Nutritional Biochemicals Pharmacia Fine Chemicals, Inc. Phase Separations Ltd. Phipps & Bird, Inc. H. Reeve Angel & Co., Inc. Reliable Chemical Co. Rohm and Haas Co. Schleicher & Schuell, Inc. Thompson Hayward Chemical Co. Unilab Research Corp. Union Carbide Corp., Carbon Products Div VWR Scientific Wilkerson Corp.

gas Alltech Associates, Inc. Aluminum Company of America Analabs, Inc. J. T. Baker Chemical Co. Barnebey-Cheney Co. Bio-Rad Laboratories Brinkmann Instruments, Inc. Chemical Research Services, Inc. Coast Engineering Laboratory Engelhard Minerals & Chemicals Corp., Minerals & Chemicals Div. Engelhard Minerals & Chemicals Corp., Engelhard Industries Div. Fisher, Scientific Co. The Fluorocarbon Co. Gallard-Schlesinger Chemical Mfg. Corp. LaPine Scientific Co. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists MG Scientific Gases Packard Instrument Co., Inc. Phase Separations Ltd. Phipps & Bird, Inc. Scientific Gas Products Inc. Arthur H. Thomas Co. Varian Aerograph Wilkerson Corp.

ACIDS inorganic Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Anderson Laboratories, Inc. Apache Chemicals, Inc. Atomergic Chemetals Co. J. T. Baker Chemical Co. Brinkmann Instruments, Inc. CCM: Schaar Scientific, Inc. Chem Service, Inc. Chemicals Procurement Labs., Inc. City Chemical Corp.

Coleman Instruments Dead Sea Works Corp. E. I. du Pont de Nemours & Co., Inc. Eastman Kodak Co. Eastman Kodak Co., Eastman Organic Chemicals Carlo Erba S.p.A. Fielding Chemical Co. Fisher Scientific Co. GAF Corp., Chemical Div. Gallard-Schlesinger Chemical Mfg. Corp. TheC. P. Hall Co. of Illinois Harleco The Harshaw Chemical Co. Hruden Laboratory Products Hyland ICN Chemical & Radioisotope Div. International Minerals & Chemical Corp. LaPine Scientific Co. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Merck Chemical Monsanto Co. Nitine, Inc. Nutritional Biochemicals Omega Chemical Corp. Ozark-Mahoning Co. PCR, Inc. Pennwalt Corp. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Prolabo Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. Rocky Mountain Research, Inc. Sigma Chemical Co. G. Frederick Smith Chemical Co. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products VWR Scientific

organic Aldrich Chemical Co., Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Apache Chemicals, Inc. Applied Science Labs., Inc. Arizona Chemical Co. Baker Castor Oil Co. J. T. Baker Chemical Co. The Borden Chemical Co. Brinkmann Instruments, Inc. CCM: Schaar Scientific, Inc. Celanese Chemical Co. Chem Service, Inc. Chemical Samples Co. Chemicals Procurement Labs., Inc. Ciba-Geigy Corp. City Chemical Corp. Columbia Organic Chemicals Co., Inc. Cyclo Chemical Dead Sea Works Corp. Difco Laboratories E. I. du Pont de Nemours & Co., Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Carlo Erba S.p.A. Farchan Research Labs. Ferro Corp., Chemical Div. Fielding Chemical Co. Fisher Scientific Co. Fox Chemical Co. Frinton Labs. Gallard-Schlesinger Chemical Mfg. Corp. General Biochemicals A. Gross & Co. Hampshire Chemical M. W. Hardy & Co., Inc. The Harshaw Chemical Co. Henley & Co., Inc. James Hinton

5 Hyland ICN Chemical & Radioisotope Div. Industrial Biochemicals, Inc. K & K Labs., Inc. Kings Laboratories Krishell Laboratories, Inc. Lachat Chemicals, Inc. LaMont Laboratories LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Marshallton Research Labs., Inc. MCB Manufacturing Chemists Merck Chemical Monsanto Co. Nitine, Inc. Nuclear Medical Systems, Inc. Nutritional Biochemicals PCR, inc. Pfaltz & Bauer, Inc. Pfanstiehl Labs, Inc. Phipps* Bird, Inc. Phy-Lab Princeton Organics, Inc. Prolabo Regis Chemical Co. Reilly Tar & Chemical Corp. Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. RHO Chemical Co. Saber Labs., Inc. Schwarz/Mann Sherwin Williams Chemicals Sigma Chemical Co. Supelco, Inc. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics VWR Scientific Willow Brook Laboratories, Inc.

ADSORBENTS, chromatography Aluminum Company of America Analabs, Inc. Analtech, Inc. Applied Science Labs., Inc. J. T. Baker Chemical Co. Barnebey-Cheney Co. Beckman Instruments, Inc. Bio-Rad Laboratories Brinkmann Instruments, Inc. Calbiochem Camag, Inc. CCM: Schaar Scientific, Inc. Coast Engineering Laboratory Colab Labs., Inc. Durrum Chemical Corp. EM Laboratories, Inc. Carlo Erba S.p.A. Fisher Scientific Co. Floridin Co. The Fluorocarbon Co. FMC Corp., American Viscose Div. FMC Corp., Organic & Inorganic Chemicals Div. Gallard-Schlesinger Chemical Mfg. Corp. W. R. Grace & Co. Greiner Scientific Corp. lonac Chemical Co. Johns-Manville Products Corp. Kensington Scientific Corp. Lachat Chemicals, Inc. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Merck Chemical Miles Labs, Inc., Research Div. (III.) M ISCO Scientific Monsanto Co. Multiform Desiccant Products, Inc. Norton Co. (Mass) Nuclear-Chicago Ozark-Mahoning Co. Packard Instrument Co., Inc. Perco Supplies Perkin-Elmer Corp. Perkin-Elmer, Ltd. Pharmacia Fine Chemicals, Inc. Phase Separations Ltd.

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Adsorbents, chromatography Chelating Agent

Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Pittsburgh Activated Carbon Div. Precision Sampling Corp. Quantum Industries H. Reeve Angel & Co., Inc. Reliable Chemical Co. Rohm and Haas Co. Scientific Manufacturing Industries The Separations Group Sigma Chemical Co. Supelco, Inc. Union Carbide Corp., Molecular Sieve Dept. VWR Scientific Waters Associates Inc.

AEROSOL CHEMICALS — see chemicals, aerosol AGRICULTURAL ANALYSIS REAGENTS

5

Allied Chemical Corp. Analabs, Inc. Anderson Laboratories, Inc. J. T. Baker Chemical Co. Brinkmann Instruments, Inc. Chemicals Procurement Labs., Inc. City Chemical Corp. Eastern Chemical Fisher Scientific Co. Hellige, Inc. International Minerals & Chemical Corp. Lachat Chemicals, Inc. LaMotte Chemical Products Co. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Merck Chemical Nanogens Omega Chemical Corp. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Prolabo Rankin Reagent Co. Regis Chemical Co. Reliable Chemical Co. Unilab Research Corp. VWR Scientific

BROMINE COMPOUNDS inorganic J. T. Baker Chemical Co. Dead Sea Works Corp. Engineered Materials Fielding Chemical Co. Freeman Industries, Inc. Harleco Hruden Laboratory Products PCR, Inc. Pfaltz& Bauer, Inc.

organic Aldrich Chemical Co., Inc. American Minechem Corp. J. T. Baker Chemical Co. Dead Sea Works Corp. Eastern Chemical Engineered Materials Freeman Industries, Inc. Frinton Labs. TheC. P. Hall Co. of Illinois Kings Laboratories Lachat Chemicals, Inc. PCR, Inc. Pfaltz& Bauer, Inc. Polysciences, Inc. Saber Labs., Inc. Willow Brook Laboratories, Inc.

BUFFERING MATERIALS—see also chemicals, pH buffers Aldrich Chemical Co., Inc. Allied Chemical Corp. Anacherma Chemicals, Inc. Apache Chemicals, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. BioQuest Bio-Rad Laboratories The Borden Chemical Co.

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Brinkmann Instruments, Inc. Calbiochem CCM: Schaar Scientific, Inc. Coleman Instruments Corco Chemical Corp. Corning Glass Works (N.Y.) Corning Glass Works (Mass.) Curtin Scientific Co. Difco Laboratories Durrum Chemical Corp. DynalabCorp. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Engelhard Minerals & Chemicals Corp., Engelhard Industries Div. Carlo Erba S.p.A. Fisher Scientific Co. Gelman Instrument Co. Greiner Scientific Corp. Hach Chemical Co. Harleco Hellige, Inc. Hruden Laboratory Products ICN Chemical & Radioisotope Div. LaMotte Chemical Products Co. LaPine Scientific Co. The London Co. Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Merck Chemical Microbiological Associates, Inc. Monsanto Co. Nutritional Biochemicals Omega Chemical Corp. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. P-L Biochemicals, Inc. Polysciences, Inc. Prolabo Reheis Chemical Co. Reliable Chemical Co. Sargent-Welch Scientific Co. Schwarz/Mann Sigma Chemical Co. Sircor Instruments Corp. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics VWR Scientific

CALIBRATION GAS MIXTURES FOR CHROMATOGRAPHY AND OTHER INSTRUMENTAL METHODS AIRCO Industrial Gases Air Lab, Inc. Air Products & Chemicals, Inc. Alltech Associates, Inc. Analabs, Inc. Analytical Instrument Development, Inc. Beckman Instruments, Inc. Chemical Data Systems, Inc. Corning Glass Works (N.Y.) Corning Glass Works (Mass.) Instrumentation Laboratory Inc. LaPine Scientific Co. Lif-O-Gen, Inc. Liquid Carbonic Corp. The London Co. Mallinckrodt Chemical Works, Science Products Div. Matheson Gas Products MG Scientific Gases Ohio Medical Products Phase Separations Ltd. Phillips Petroleum Co. Precision Gas Products, Inc. Rank Precision Industries Reliable Chemical Co. Scientific Gas Products Inc. Scott Research Laboratories, Inc. Setaram Sigma Chemical Co. Supelco, Inc. Thermco Instrument Corp. Union Carbide Corp., Linde Div.

CALIBRATION STANDARDS

Andor Chemical Corp. Apache Chemicals, Inc. Aremco Products, Inc. ArRo Labs., Inc. Baird-Atomic, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Cambridge Nuclear Corp. Chem Service, Inc. Coleman Instruments Corning Glass Works (Mass.) EM Laboratories, Inc. Carlo Erba S.p.A. Fisher Scientific Co. Fiske Associates, Inc. Harleco Houston-Atlas, Inc. Hruden Laboratory Products Hyland ICN Chemical & Radioisotope Div. INAX Instruments Ltd. Jarrell-Ash Div. Morris P. Kirk &Son, Inc. LaPine Scientific Co. The London Co. MCB Manufacturing Chemists Milton Roy Co. Monitor Labs., Inc. Olson Laboratories, Inc. Orion Research Inc. PCR, Inc. Phase Separations Ltd. Phy-Lab Pressure Chemical Co. Prolabo Radiation Materials Co., Inc. Reliable Chemical Co. Scientific Gas Products Inc. Sircor Instruments Corp. Smith-Underwood Laboratories Spectrogram Corp. Stewart Laboratories, Inc. Technicon Instruments Corp. United Mineral & Chemical Corp. Ventron Corp., Alfa Products

organic Air Products & Chemicals, Inc. Allied Chemical Corp. Anachemia Chemicals, Inc. Analabs, Inc. Analytical Instrument Development, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Applied Science Labs., Inc. Aremco Products, Inc. ArRo Labs., Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Bio-Rad Laboratories Cannon Instrument Co. Carnegie-Mellon University Chem Service, Inc. Chemical Samples Co. Conostan Div. Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A. Fisher Scientific Co. James Hinton Houston-Atlas, Inc. Hruden Laboratory Products Hyland Ionics, Inc. Kings Laboratories Lachat Chemicals, Inc. LaPine Scientific Co. MCB Manufacturing Chemists Nanogens New England Nuclear Nuclear Medical Systems. Inc. Olson Laboratories, Inc. Packard Instrument Co., Inc. PCR, Inc. Perco Supplies Phase Separations Ltd. Phillips Petroleum Co. Pierce Chemical Co. PolyScience Corp. Pressure Chemical Co. Princeton Organics, Inc. Prolabo Reliable Chemical Co. Scientific Gas Products Inc. Supelco, Inc. Technicon Instruments Corp. Unilab Research Corp. Varian Aerograph

inorganic AIRCO Industrial Gases Air Products & Chemicals, Inc. Allied Chemical Corp. Alpha Metals, Inc. Anachemia Chemicals, Inc. Analytical Instrument Development, Inc. Anderson Laboratories, Inc.

CALORIMETRIC CHEMICALS — s e e chemicals, calorimetric

CARBOHYDRATES Aldrich Chemical Co., Inc. Allied Chemical Corp. Analabs, Inc. Apache Chemicals, Inc. Ash Stevens Inc. J. T. Baker Chemical Co. Calbiochem Chem Service, Inc. Chemicals Procurement Labs., Inc. City Chemical Corp. Difco Laboratories Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Gallard-Schlesinger Chemical Mfg. Corp. ICN Chemical & Radioisotope Div. Krishell Laboratories, Inc. LaPine Scientific Co. MCB Manufacturing Chemists Miles Labs, Inc., Research Div. (III.) Miles Labs., Inc. Nuclear Medical Systems, Inc. Pfanstiehl Labsi Inc. Phase Separations Ltd. Phy-Lab Pierce Chemical Co. Reliable Chemical Co. Saber Labs., Inc. SAS Scientific Chemicals, Ltd. Schwarz/Mann Sigma Chemical Co. A. E. Staley Mfg. Co. Supelco, Inc. Terra-Marine Bioresearch VWR Scientific

CATALYSTS Air Products & Chemicals, Inc. Allied Chemical Corp. Aluminum Company of America Anderson Development Co. Apache Chemicals, Inc. Atlantic Equipment Engineers Baker Castor Oil Co. Barnebey-Cheney Co. CCM: Schaar Scientific, Inc. Coleman Instruments E-C Apparatus Engelhard Minerals & Chemicals Corp., Minerals & Chemicals Div. Engelhard Minerals & Chemicals Corp., Engelhard Industries Div. Gallard-Schlesinger Chemical Mfg. Corp. Harleco The Harshaw Chemical Co. Krishell Laboratories, Inc. Lachat Chemicals, Inc. LaPine Scientific Co. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. M&T Chemicals Inc. MCB Manufacturing Chemists Mine Safety Appliances Co. MSA Research Corp. Ν. Β. NewcombCo., Inc. Norton Co. (Mass) PCR, Inc. Phase Separations Ltd. Pittsburgh Activated Carbon Div. Polysciences, Inc. Pressure Chemical Co. Ram Chemicals Reliable Chemical Co. Rocky Mountain Research, Inc. Strem Chemicals, Inc. Union Carbide Corp., Chemicals & Plastics Union Carbide Corp., Materials Systems Div. VAR-LAC-OID Chemical Co. Worthington Biochemical Corp.

CELLULOSES, ion exchange — see ion exchange chemicals CHELATING AGENT Achem Div. Aldrich Chemical Co., Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. The Ames Laboratories, Inc. Apache Chemicals, Inc. Atomergic Chemetals Co. J. T. Baker Chemical Co. Betz Laboratories, Inc. Chem Service, Inc. Ciba-Geigy Corp. City Chemical Corp.

LABORATORY GUIDE

5

Chelating Agent Chemicals, chromatographic

Columbia Organic Chemicals Co., Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Carlo ErbaS.p.A. Fisher Scientific Co. Fiske Associates, Inc. Frinton Labs. GAF Corp., Chemical Div. TheC. P. Hall Co. of Illinois Harleco Industrial Biochemicals, Inc. Kings Laboratories LaMont Laboratories LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Monsanto Co. Nopco Chemical Div. PCR, Inc. Pfanstiehl Labs, Inc. Pierce Chemical Co. Reliable Chemical Co. Sigma Chemical Co. G. Frederick Smith Chemical Co. Strem Chemicals, Inc. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics

CHEMICALS general

Γ5

Achem Div. Air Products & Chemicals, Inc. Aldrich Chemical Co., Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. American Minechem Corp. American Potash & Chemical Corp. The Ames Laboratories, Inc. Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Apache Chemicals, Inc. Arizona Chemical Co. Ash Stevens Inc. Atlantic Equipment Engineers Baker Castor Oil Co. J. T. Baker Chemical Co. Barium and Chemicals, Inc. Brinkmann Instruments, Inc. Carnegie-Mellon University CCM: Schaar Scientific, Inc. Celanese Chemical Co. Cerac, Inc. Chem Service, Inc. Chemical & Solvent Distillers Co., Inc. Chemical Data Systems, Inc. Chemical Samples Co. Chemicals Procurement Labs., Inc. Ciba-GeigyCorp. City Chemical Corp. Climax Molybdenum Co. Columbia Organic Chemicals Co., Inc. Crest Ultrasonics Corp. A. Daigger & Co. Dead Sea Works Corp. Detrex Chemical Industries, Inc. Devcon Corp. E. I. du Pont de Nemours & Co., Inc. Dynasonics Corp. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Electronic Space Products, Inc. Engineered Materials Carlo ErbaS.p.A. Fairmount Chemical Co., Inc. Fine Organics, Inc. Fisher Scientific Co. FMC Corp., Organic & Inorganic Chemicals Div. Frinton Labs. GAF Corp., Chemical Div. Gallard-Schlesinger Chemical Mfg. Corp. Greiner Scientific Corp. TheC. P. Hall Co. of Illinois Harleco The Harshaw Chemical Co. Heico, Inc. James Hinton Huxley Development Corp. ICN Chemical & Radioisotope Div. International Salt Co. Lachat Chemicals, Inc. LaMotte Chemical Products Co. L & R Manfacturing Co. LaPine Scientific Co. Lithium Corp. of America Magna Corp. Mallinckrodt Chemical Works, Science Products Div. Marshallton Research Labs., Inc. MCB Manufacturing Chemists Merck Chemical Merix Chemical Co.

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Monsanto Co. Nease Chemical Co., Inc. Nitine, Inc. Ν L Industries, Inc., Pigments & Chemical Div. Nopco Chemical Div. Ozark-Mahoning Co. PCR, Inc. Pfaltz & Bauer, Inc. Phase Separations Ltd. Philadelphia Quartz Co. Phipps& Bird, Inc. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Prolabo Ram Chemicals Reilly Tar & Chemical Corp. Rocky Mountain Research, Inc. Saber Labs., Inc. Semi-Elements, Inc. Sigma Chemical Co. G. Frederick Smith Chemical Co. Technic, Inc. Arthur H. Thomas Co. Thompson Hayward Chemical Co. Tudor Scientific Glass Co. Union Carbide Corp., Chemicals & Plastics United Mineral & Chemical Corp. U. S. Industrial Chemicals Co. The Upjohn Co., Carwin Organic Chemicals R. T. VanderbiltCo., Inc. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products Virginia Chemicals Inc. VWR Scientific White Chemical Corp. Whittaker Corp. Wood Ridge Chemical Corp.

aerosol Acheson Colloids Co. Air Products & Chemicals, Inc. Allied Chemical Corp. Brinkmann Instruments, Inc. Camag, Inc. Cerac, Inc. Devcon Corp. Dilco Chemical Corp. E. I. du Pont de Nemours & Co., Inc. Electronic Space Products, Inc. Fisher Scientific Co. Geoscience Instruments Corp. LaPine Scientific Co. Nutritional Biochemicals Ohio Medical Products PennwaltCorp. Phase Separations Ltd. Phillips Petroleum Co. Phipps& Bird, Inc. Phy-Lab Plasti-Kote Co. Quantum Industries Ram Chemicals Royco Instruments, Inc. Scientific Gas Products Inc. Sigma Chemical Co. Union Carbide Corp., Chemicals & Plastics The Upjohn Co., Carwin Organic Chemicals

aerospace Air Products & Chemicals, Inc. Allied Chemical Corp. Anachemia Chemicals, Inc. Apache Chemicals, Inc. Barnebey-Cheney Co. Eastern Chemical Electronic Space Products, Inc. James Hinton Hughes Aircraft Co. Lithium Corp. of America Merix Chemical Co. Monsanto Co. Pfaltz & Bauer, Inc. Polysciences, Inc. Reliable Chemical Co. Rocky Mountain Research, Inc. Sunshine Chemical Corp. Tivian Laboratories, Inc. United Mineral & Chemical Corp. Ventron Corp., Alfa Products

biochemical Air Products & Chemicals, Inc. Aldrich Chemical Co., Inc. Allied Chemical Corp. Alpine Geophysical Associates, Inc. Amend Drug & Chemical Co., inc. The Ames Laboratories, Inc. Anachemia Chemicals, Inc.

Analabs, Inc. Apache Chemicals, Inc. Applied Science Labs., Inc. Ash Stevens Inc. J. T. Baker Chemical Co. Biochemical & Nuclear Corp. Biopolymers Laboratory of General Biochemicals Bodman Chemicals Boehringer Mannheim Corp. The Borden Chemical Co. Brinkmann Instruments, Inc. Calbiochem Carbolabs, Inc. CCM: Schaar Scientific, Inc. Chem Service, Inc. Chemicals Procurement Labs., Inc. City Chemical Corp. Columbia Organic Chemicals Co., Inc. Cyclo Chemical A. Daigger & Co. Dexter Biological Co. Difco Laboratories E. I. du Pont de Nemours & Co., Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Fermco Laboratories Fisher Scientific Co. Fox Chemical Co. Freeman Industries, Inc. Frinton Labs. Gallard-Schlesinger Chemical Mfg. Corp. General Biochemicals Grand Island Biological Co. Greiner Scientific Corp. M. W. Hardy & Co., Inc. Harleco Heico, Inc. Hruden Laboratory Products Hyland ICN Chemical & Radioisotope Div. lonac Chemical Co. Isolab, Inc. H. J. Jensen, Inc. K & K Labs., Inc. Krishell Laboratories, Inc. Lachat Chemicals, Inc. LaMotte Chemical Products Co. LaPine Scientific Co. M&T Chemicals Inc. Maurukas Co., Inc. MCB Manufacturing Chemists Miles Labs, Inc., Research Div. (111.) Miles Labs., Inc. New England Nuclear New Haven Chemical Corp. Nuclear Medical Systems, Inc. Nutritional Biochemicals Omega Chemical Corp. PCR, Inc. Perco Supplies Petrarch Systems Pfaltz & Bauer, Inc. Pfanstiehl Labs, Inc. Pharmacia Fine Chemicals, Inc. Phase Separations Ltd. Phipps& Bird, Inc. Phy-Lab Pierce Chemical Co. P-L Biochemicals, Inc. Plenum Scientific Research, Inc. Polysciences, Inc. Regis Chemical Co. Reheis Chemical Co. Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. Saber Labs., Inc. SAS Scientific Chemicals, Ltd. Schwarz/Mann Sheffield Chemical Sigma Chemical Co. Spectrum Medical Industries, Inc. Supelco, Inc. Syva Co. Technicon Instruments Corp. Terra-Marine Bioresearch Union Carbide Corp., Chemicals & Plastics The Upjohn Co., Carwin Organic Chemicals The Upjohn Co., Fine Chemical Marketing R. T. VanderbiltCo., Inc. VAR-LAC-OID Chemical Co. VWR Scientific Wateree Chemical Co., Inc. Winthrop Laboratories Wood Ridge Chemical Corp. Worthington Biochemical Corp.

biological grade Air Products & Chemicals, Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Analabs, Inc. Apache Chemicals, Inc.

J. T. Baker Chemical Co. Brinkmann Instruments, Inc. Calbiochem CCM: Schaar Scientific, Inc. City Chemical Corp. Cudahy Labs. A. Daigger & Co. Dexter Biological Co. E. I. du Pont de Nemours & Co., Inc. Fermco Laboratories Fisher Scientific Co. Fox Chemical Co. Gallard-Schlesinger Chemical Mfg. Corp. Greiner Scientific Corp. M. W. Hardy & Co., Inc. Harleco Heico, Inc. Hruden Laboratory Products Hyland ICN Chemical & Radioisotope Div. Isolab, Inc. H.J.Jensen,Inc. K & Κ Labs., Inc. LaPine Scientific Co. Lithium Corp. of America MCB Manufacturing Chemists Merck Chemical Miles Labs, Inc., Research Div. (111.) Miles Labs., Inc. National Instrument Laboratories, Inc. Nuclear Medical Systems, Inc. Nutritional Biochemicals Pfaltz & Bauer, Inc. Pfanstiehl Labs, Inc. Phase Separations Ltd. Phipps& Bird, Inc. Phy-Lab Pierce Chemical Co. P-L Biochemicals, Inc. Polysciences, Inc. Regis Chemical Co. Reliable Chemical Co. SAS Scientific Chemicals, Ltd. Schwarz/Mann Scientific Gas Products Inc. Sheffield Chemical Sigma Chemical Co. Terra-Marine Bioresearch VWR Scientific

calorimetric Air Products & Chemicals, Inc. Allied Chemical Corp. American Minechem Corp. Apache Chemicals, Inc. Armour Industrial Chemical Co. J. T. Baker Chemical Co. Carnegie-Mellon University A. Daigger & Co. Carlo ErbaS.p.A. Fisher Scientific Co. Greiner Scientific Corp. James Hinton LaPine Scientific Co. Maurukas Co., Inc. Omega Chemical Corp. Parr Instrument Co. Phase Separations Ltd. Phillips Petroleum Co. Phipps& Bird, Inc. Phy-Lab Prolabo Scientific Gas Products Inc. VWR Scientific

chromatographic AcMem Div. Air Products & Chemicals, Inc. Alltech Associates, Inc. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Analabs, Inc. Antek Instruments, Inc. Apache Chemicals, Inc. Applied Science Labs., Inc. J. T. Baker Chemical Co. Barnebey-Cheney Co. Beckman Instruments, Inc. Bio-Cal Instrument Co. Bio-Rad Laboratories Brinkmann Instruments, Inc. Calbiochem Carnegie-Mellon University CCM: Schaar Scientific, Inc. Chem Service, Inc. Chemical Samples Co. Chemicals Procurement Labs., Inc. City Chemical Corp. Colab Labs., Inc. A. Daigger & Co. DOHRMANN Div. Envirotech Corp. Durrum Chemical Corp. Durrum Instrument Corp. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals

LABORATORY GUIDE

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Chemicals, chromatographic Chemicals, organic sulfur compounds

EM Laboratories, Inc. Carlo ErbaS.p.A. Fisher Scientific Co. Floridin Co. Frinton Labs. Gallard-Schlesinger Chemical Mfg. Corp. W. R. Grace & Co. Greiner Scientific Corp. Harteco James Hinton ICN Chemical & Radioisotope Div. K & Κ Labs., Inc. Kensington Scientific Corp. Lachat Chemicals, Inc. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Merck Chemical Miles Labs., Inc. Nanogens Nutritional Biochemicals Ohio Valley Specialty Chemical Co. Packard Instrument Co., Inc. PCR, Inc. Perco Supplies Perkin-Elmer, Ltd. Petrarch Systems Pfaltz& Bauer, Inc. Pharmacia Fine Chemicals, Inc. Phase Separations Ltd. Phipps& Bird, Inc. Phy-Lab Pierce Chemical Co. PolyScience Corp. Polysciences, Inc. Precision Sampling Corp. Prolabo Quantum Industries H. Reeve Angel & Co., Inc. Regis Chemical Co. Reliable Chemical Co. Rhodia, Inc. Rohm and Haas Co. SAS Scientific Chemicals, Ltd. Schleicher & Schuell, Inc. Scientific Gas Products Inc. Scientific Manufacturing Industries The Separations Group Sigma Chemical Co. Supelco, Inc. Technicon Instruments Corp. VWR Scientific Waters Associates Inc.

combustion apparatus Allied Chemical Corp. Anachemia Chemicals, Inc. J. T. Baker Chemical Co. Bico, Inc. Coleman Instruments Curtin Scientific Co. A. Daigger & Co. Harry W. DietertCo. Greiner Scientific Corp. James Hinton LaPine Scientific Co. Maxon Corp. Packard Instrument Co., Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Reliable Chemical Co. VWR Scientific

conductive coating Acheson Colloids Co. Applied Plastics Co., Inc. EM Laboratories, Inc. Materials Research Corp. Merix Chemical Co. Polysciences, Inc. RCA Electronic Components Reliable Chemical Co. Rocky Mountain Research, Inc. Tivian Laboratories, Inc. Whitford Corp.

electronic grade AIRCO Industrial Gases Air Products & Chemicals, Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Anderson Physics Labs., Inc. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Barium and Chemicals, Inc. Bodman Chemicals Brinkmann Instruments, Inc. Cerac, Inc.

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City Chemical Corp. Corco Chemical Corp. Crest Ultrasonics Corp. A. Daigger & Co. Dow Corning Corp. E. I. du Pont de Nemours &Co., Inc. Eagle-Picher Industries, Inc. Electronic Space Products, Inc. EM Laboratories, Inc. Engineered Materials Carlo Erba S.p.A. Fielding Chemical Co. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. M. W. Hardy & Co., Inc. The Harshaw Chemical Co. Heico, Inc. Hruden Laboratory Products Hughes Aircraft Co. Imanco-Metals Research Kawecki Berylco Industries, Inc. Lachat Chemicals, Inc. L & R Manfacturing Co. Mallinckrodt Chemical Works, Science Products Div. M&T Chemicals Inc. Materials Research Corp. Matheson Gas Products Merck Chemical Merix Chemical Co. Nitine, Inc. PCR, Inc. Pfaltz& Bauer, Inc. Pfizer Minerals, Pigments & Metals Div. Phy-Lab Polysciences, Inc. Precision Gas Products, Inc. Princeton Organics, Inc. Prolabo RCA Electronic Components Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. Rocky Mountain Research, Inc. Scientific Gas Products Inc. Semi-Elements, Inc. Southwestern Analytical Chemicals, Inc. Sunshine Chemical Corp. Technic, Inc. Tect, Inc. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products VWR Scientific Xtalonix Products

heavy liquids for density determination American Minechem Corp. Anderson Laboratories, Inc. R. P. Cargille Labs., Inc. City Chemical Corp. A. Daigger & Co. Eastern Chemical Engineered Materials Carlo Erba S.p.A. Fielding Chemical Co. Kaltec Scientific Instrument, Inc. MCB Manufacturing Chemists National Biochemical Pfaltz & Bauer, Inc. Polysciences, Inc. VAR-LAC-OID Chemical Co.

ion exchange - see ion exchange chemicals isotope Amersham/Searle Corp. Atomic Corp. of America Atomic Energy of Canada Ltd. Baird-Atomic, Inc. J. T. Baker Chemical Co. Bio-Rad Laboratories Cambridge Nuclear Corp. Canrad Precision Industries, Inc. Controlled Atmosphere, Inc. Diaprep, Inc. General Electric Co. General Electric Co., Irradiation Processing Operation ICN Chemical & Radioisotope Div. Isolab, Inc. Isomet Corp. 3M Co., Nuclear Products Dept. Mallinckrodt Chemical Works, Science Products Div. Mallinckrodt/Nuclear Merck Sharp & Dohme Canada Ltd. Merck Chemical Miles Labs, Inc., Research Div. (III.) Miles Labs., Inc.

New England Nuclear Norell Chemical Co., Nuclear Equipment Chemical Corp. Nuclear Medical Systems, Inc. Pfaltz & Bauer, Inc. Phy-Lab Radiation Materials Co., Inc. SAS Scientific Chemicals, Ltd. Schwarz/Mann Scientific Gas Products Inc. Spectrum Medical Industries, Inc. Stohler Isotope Chemicals, Inc. Union Carbide Corp., Sterling Forest Research Center United Mineral & Chemical Corp. Ventron Corp., Alfa Products

luminescent Allied Chemical Corp. Alusuisse Metals Inc. Anachemia Chemicals, Inc. Analabs, Inc. Apache Chemicals, Inc. Canrad Precision Industries, Inc. Cerac, Inc. Chemicals Procurement Labs., Inc. City Chemical Corp. CTE Sylvania Inc. E. I. du Pont de Nemours & Co., Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Electronic Space Products, Inc. Carlo Erba S.p.A. Gallard-Schlesinger Chemical Mfg. Corp. James Hinton Hruden Laboratory Products Imanco-Metals Research Kensington Scientific Corp. 3M Co., Nuclear Products Dept. Mallinckrodt Chemical Works, Science Products Div. Materials Research Corp. Pfaltz & Bauer, Inc. Phy-Lab Reliable Chemical Co. Research Organic/ Inorganic Chemical Corp. SAS Scientific Chemicals, Ltd. Scientific Manufacturing Industries Semi-Elements, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co.

mercury determining J. T. Baker Chemical Co. Barnebey-Cheney Co. Coleman Instruments A. Daigger & Co. Eastern Chemical Fielding Chemical Co. Hach Chemical Co. Harleco Hruden Laboratory Products Koslow Scientific Co. Pfaltz & Bauer, Inc. Polysciences, Inc.

milk testing Advanced Instruments, Inc. Allied Chemical Corp. Analabs, Inc. Anderson Laboratories, Inc. Andor Chemical Corp, J. T. Baker Chemical Co. BioQuest Bodman Chemicals CCM: Schaar Scientific, Inc. Cudahy Labs. A. Daigger & Co. Eastern Chemical Carlo ErbaS.p.A. Fielding Chemical Co. Fiske Associates, Inc. Gallard-Schlesinger Chemical Mfg. Corp. Grand Island Biological Co. Greiner Scientific Corp. Harleco LaMotte Chemical Products Co. LaPine Scientific Co. Lumenite Electronic Corp. Nuclear Medical Systems, Inc. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Prolabo Sigma Chemical Co. Technicon Instruments Corp. Thompson Hayward Chemical Co. VWR Scientific

moisture determining Air Products & Chemicals, Inc. Allied Chemical Corp. Anachemia Chemicals, Inc. Anderson Laboratories, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. CCM: Schaar Scientific, Inc. Harry W. DietertCo. Carlo ErbaS.p.A. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Greiner Scientific Corp. Harleco LaPine ScienJific Co. Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Merck Chemical Moisture Register Co. Omega Chemical Corp. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Precision Gas Products, Inc. Prolabo Reliable Chemical Co. Scientific Gas Products Inc. G. Frederick Smith Chemical Co. VWR Scientific Wilkerson Corp.

nitrogen determining Achem Div. Air Products & Chemicals, Inc. Allied Chemical Corp. Anachemia Chemicals, Inc. Anderson Laboratories, Inc. J. T. Baker Chemical Co. City Chemical Corp. Coleman Instruments Eastern Chemical Carlo Erba S.p.A. Fisher Scientific Co. Greiner Scientific Corp. Hach Chemical Co. Harleco Hengar Co. Hyland LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Merck Chemical Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Reliable Chemical Co. Research Appliance Co. Technicon Instruments Corp. Arthur H. Thomas Co. VWR Scientific

organic sulfur compounds Aldrich Chemical Co., Inc. Allied Chemical Corp. Anachemia Chemicals, Inc. Analabs, Inc. Angstrom, Inc. Apache Chemicals, Inc. Ash Stevens Inc. J. T. Baker Chemical Co. Bodman Chemicals Carnegie-Mellon University Chem Service, Inc. Chemical Samples Co. Chemicals Procurement Labs., Inc. City Chemical Corp. Columbia Organic Chemicals Co., Inc. Cosan Chemical Corp. Detrex Chemical Industries, Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Electronic Space Products, Inc. Carlo Erba S.p.A. Evans Chemetics, Inc. Fox Chemical Co. Frinton Labs. M. W. Hardy & Co., Inc. James Hinton The Humphrey Chemical Co. ICN Chemical & Radioisotope Div. K & Κ Labs., Inc. Krishell Laboratories, Inc. Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Merck Chemical PCR, inc. Pennwalt Corp. Perco Supplies Pfaltz & Bauer, Inc. Phase Separations Ltd. Phillips Petroleum Co. Phipps & Bird, Inc.

LABORATORY GUIDE

Chemicals, organic sulfur compounds Chemicals, reagent grade PolyScience Corp. Polysciences, Inc. Prolabo Reliable Chemical Co. Saber Labs., Inc. Sherwin Williams Chemicals Sigma Chemical Co. Specialty Organics, Inc. Union Carbide Corp., Chemicals & Plastics Wateree Chemical Co., Inc. Willow Brook Laboratories, Inc. Wood Ridge Chemical Corp.

organometallic Agrashell, Inc. Aldrich Chemical Co., Inc. Allied Chemical Corp. Anderson Development Co. Angstrom, inc. Apache Chemicals, Inc. Arapahoe Chemicals Atomergic Chemetals Co. Austin Science Associates, Inc. J. T. Baker Chemical Co. Chemical Samples Co. Chemicals Procurement Labs., Inc. City Chemical Corp. Climax Molybdenum Co. Columbia Organic Chemicals Co., Inc. Cosan Chemical Corp. A. Daigger & Co. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Electronic Space Products, Inc. Carlo ErbaS.p.A. Ferro Corp., Chemical Div. Frinton Labs. D. F. Goldsmith Chemical & Metal Corp. M. W. Hardy & Co., Inc. The Harshaw Chemical Co. Henley & Co., Inc. ICN Chemical & Radioisotope Div. K & Κ Labs., Inc. Kings Laboratories Lachat Chemicals, Inc. LaMont Laboratories Lithium Corp. of America M&T Chemicals Inc. Marshallton Research Labs., Inc. Matheson Gas Products Matthey Bishop, Inc. Mine Safety Appliances Co. MSA Research Corp. National Spectrograph^ Laboratories, Inc. Ohio Valley Specialty Chemical Co. Orgmet, Inc. PCR, Inc. Petrarch Systems Pfaltz & Bauer, Inc. Phase Separations Ltd. Polysciences, Inc. Pressure Chemical Co. Reliable Chemical Co. RHO Chemical Co. Scientific Gas Products Inc. Sigma Chemical Co. Specialty Organics, Inc. Stohler Isotope Chemicals, Inc. Strem Chemicals, Inc. Union Carbide Corp., Chemicals & Plastics United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products Willow Brook Laboratories, Inc. Wood Ridge Chemical Corp.

oxidizing compounds Achem Div. Air Products & Chemicals, Inc. Aldrich Chemical Co., Inc. Allied Chemical Corp. Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Apache Chemicals, Inc. J. T. Baker Chemical Co. Carus Chemical Co., Inc. Chem Service, Inc. Chemicals Procurement Labs., Inc. City Chemical Corp. E. I. du Pont de Nemours & Co., Inc. Eastman Kodak Co., Eastman Organic Chemicals Carlo Erba S.p.A. FMC Corp., Organic & Inorganic Chemicals Div. M. W. Hardy & Co., Inc. Harleco Hummel Chemical Co., Inc. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists

LABORATORY GUIDE

Nuclear Medical Systems, Inc. Ozark-Mahoning Co. PCR, Inc. Pfaltz & Bauer, Inc. Phase Separations Ltd. Ram Chemicals Reliable Chemical Co. G. Frederick Smith Chemical Co. Tenneco Chemicals, Inc. Thompson Hayward Chemical Co. Ventron Corp., Alfa Products

pH buffers Ace Scientific Supply Co., Inc. Aldrich Chemical Co,, Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Analytical Measurements, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Bio-Rad Laboratories The Borden Chemical Co. Brinkmann Instruments, Inc. Calbiochem R. P. Cargille Labs., Inc. CCM: Schaar Scientific, Inc. Central Scientific Co. Coleman Instruments Corco Chemical Corp. Corning Glass Works (N.Y.) Corning Glass Works (Mass.) Curtin Scientific Co. A. Daigger & Co. Difco Laboratories Durrum Chemical Corp. Eastern Chemical EM Laboratories, Inc. Carlo Erba S.p.A. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Gelman Instrument Co. General Biochemicals Greiner Scientific Corp. Hach Chemical Co. Harleco Helena Laboratories Hellige, Inc. Hruden Laboratory Products ICN Chemical & Radioisotope Div. Instrumentation Laboratory Inc. LaMotte Chemical Products Co. LaPine Scientific Co. Leeds & Northrup Co. The London Co. Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Microbiological Associates, Inc. Monsanto Co. Nuclear Medical Systems, Inc. Omega Chemical Corp. Pfaltz & Bauer, Inc. Phipps& Bird, Inc. Photovolt Corp. Phy-Lab Pierce Chemical Co. P-L Biochemicals, Inc. Polysciences, Inc. Reheis Chemical Co. Schwarz/Mann Scientific Products Sigma Chemical Co. Sircor Instruments Corp. Technicon Instruments Corp. Arthur H. Thomas Co. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics VWR Scientific

RCA Electronic Components Reliable Chemical Co. SAS Scientific Chemicals, Ltd. Scientific Gas Products Inc. Scientific Manufacturing Industries Semi-Elements, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products

photographic Allied Chemical Corp. Amend Drug & Chemical Co., inc. Anachemia Chemicals, Inc. J. T. Baker Chemical Co. Carus Chemical Co., Inc. Ciba-Geigy Corp. City Chemical Corp. A. Daigger & Co. E. I. du Pont de Nemours & Co., Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo ErbaS.p.A. Fairmount Chemical Co., Inc. Gallard-Schlesinger Chemical Mfg. Corp. M. W. Hardy & Co., Inc. The Harshaw Chemical Co. Heico, Inc. LaPine Scientific Co. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. Merix Chemical Co. National Spectrographs Laboratories, Inc. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Sherwin Williams Chemicals Thompson Hayward Chemical Co. Townley Chemical Corp. The Upjohn Co., Fine Chemical Marketing VAR-LAC-OID Chemical Co.

platinum metal Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. City Chemical Corp. A. Daigger & Co. E. I. du Pont de Nemours & Co., Inc. Electronic Space Products, Inc. Engelhard Minerals & Chemicals Corp., Engelhard Industries Div. Engineered Materials Fairmount Chemical Co., Inc. D. F. Goldsmith Chemical & Metal Corp. Goldsmith Precious Me»els Div. Hruden Laboratory Products Materials Research Corp. Matthey Bishop, Inc. MCB Manufacturing Chemists PCR, Inc. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Polysciences, Inc. Prolabo Reliable Chemical Co. The Sel-Rex Co. Strem Chemicals, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products VWR Scientific

phosphors

polarographic

Aldrich Chemical Co., Inc. Anachemia Chemicals, Inc. City Chemical Corp. Eastman Kodak Co., Eastman Organic Chemicals Electronic Space Products, Inc. The Harshaw Chemical Co. Hruden Laboratory Products ICN Chemical & Radioisotope Div. InterexCorp. Isolab, Inc. Kensington Scientific Corp. Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists New England Nuclear Nuclear Equipment Chemical Corp. Packard Instrument Co., Inc. Pfaltz & Bauer, Inc. Phipps& Bird, Inc. Polysciences, Inc. Quantum Industries

Allied Chemical Corp. Apache Chemicals, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Brinkmann Instruments, Inc. Carlo ErbaS.p.A. James Hinton Hruden Laboratory Products LaPine Scientific Co. MCB Manufacturing Chemists Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Reliable Chemical Co. G. Frederick Smith Chemical Co. Southwestern Analytical Chemicals, Inc.

radioactive Aerotest Operations AIRCO Industrial Gases

5

American Nuclear Corp. Amersham/Searle Corp. Applied Science Labs., Inc. Atomic Corp. of America Baird-Atomic, Inc. Calbiochem Cambridge Nuclear Corp. Central Scientific Co. Eberline Instrument Corp. General Electric Co. General Electric Co., Irradiation Processing Operation ICN Chemical & Radioisotope Div. Isolab, Inc. 3M Co., Nuclear Products Dept. Mallinckrodt Chemical Works, Science Products Div. Mallinckrodt/Nuclear Miles Labs, Inc., Research Div. (III.) Miles Labs., inc. New England Nuclear Nuclear Associates, Inc. Nuclear Equipment Chemical Corp. Nuclear Materials & Equipment Corp. Nuclear Medical Systems, Inc. Nucleonic Corp. of America Packard Instrument Co., Inc. Radiation Materials Co., Inc. Rocky Mountain Research, Inc. Schwarz/Mann Scientific Gas Products Inc. Spectrum Medical Industries, Inc. Stohler Isotope Chemicals, Inc. Union Carbide Corp., Sterling Forest Research Center U. S. Nuclear Corp.

reagent, acids Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Applied Science Labs., Inc. Atomergic Chemetals Co. J. T. Baker Chemical Co. Beckman Instruments, Inc. Brinkmann Instruments, Inc. CCM: Schaar Scientific, Inc. Chemical Samples Co. City Chemical Corp. Columbia Organic Chemicals Co., Inc. Corco Chemical Corp. A. Daigger & Co. E. I. du Pont de Nemours & Co., Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A. Fielding Chemical Co. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. General Biochemicals Greiner Scientific Corp. TheC. P. Hall Co. of Illinois Harleco James Hinton Hyland ICN Chemical & Radioisotope Div. Lachat Chemicals, Inc. LaPine Scientific Co. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. Matheson Scientific MCB Manufacturing Chemists Merck Chemical Miles Labs., Inc. Nitine, Inc. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Prolabo Rocky Mountain Research, Inc. SAS Scientific Chemicals, Ltd. G. Frederick Smith Chemical Co. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics VAR-LAC-OID Chemical Co. VWR Scientific

reagent grade Aero Chemical Corp. Aldrich Chemical Co., Inc. Allied Chemical Corp. Amend Drug & Chemical Co., American Minechem Corp. The Ames Laboratories, Inc. Anachemia Chemicals, Inc. Analabs, Inc. Andor Chemical Corp. Apache Chemicals, Inc.

AUGUST 1972 293 LG

5

5

5

Chemicals, reagent grade Chemicals, ultraviolet absorbing

Applied Science Labs., Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Barium and Chemicals. Inc. Brinkmann Instruments. Inc. CCM: Schaar Scientific, Inc. Central Scientific Co. Chem Service, Inc. Chemical Samples Co. City Chemical Corp. Columbia Organic Chemicals Co., Inc. Corco Chemical Corp. A. Daigger & Co. Dead Sea Works Corp. E. I. du Pont de Nemours & Co., Inc. Eagle-Picher Industries, Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A. Fermco Laboratories Fielding Chemical Co. Fine Organics, Inc. Fisher Scientific Co. Fox Chemical Co. Frinton Labs. Gallard-Schlesinger Chemical Mfg. Corp. General Biochemicals D. F. Goldsmith Chemical & Metal Corp. Greiner Scientific Corp. Harleco Heico, Inc. James Hinton Hyland ICN Chemical S Radioisotope Div. Lachat Chemicals, Inc. LaMont Laboratories LaPine Scientific Co. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Merck Chemical Miles Labs, Inc., Research Div. (III.) MSA Research Corp. New England Nuclear Nitine, Inc. Omega Chemical Corp. PCR, Inc. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Prolabo Regis Chemical Co. Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. Research Products International Corp. Rocky Mountain Research, Inc. SAS Scientific Chemicals, Ltd. Schwarz/Mann G. Frederick Smith Chemical Co, Southwestern Analytical Chemicals, Inc. Story Chemical Corp. Supelco, Inc. Technicon Instruments Corp. Thompson Hayward Chemical Co. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. VWR Scientific Wood Ridge Chemical Corp.

scintillation Aldrich Chemical Co., Inc. Amersham/Searle Corp. Analabs, Inc. Apache Chemicals, Inc. Arapahoe Chemicals Atomergic Chemetals Co. J. T. Baker Chemical Co. BDH Chemicals Beckman Instruments, Inc. Bodman Chemicals The Borden Chemical Co. Calbiochem Chemicals Procurement Labs., Inc. City Chemical Corp. A. Daigger & Co. Dero Research & Development Corp. Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A. The Harshaw Chemical Co. James Hinton ICN Chemical & Radioisotope Div. Interex Corp. Intértechnique Instruments, Inc. Isolab, Inc. Κ & Κ Labs., Inc. Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists New England Nuclear Nuclear Associates, Inc.

294 LG AUGUST 1972

Nuclear Enterprises, Inc. Nuclear Equipment Chemical Corp. Nuclear Medical Systems, Inc. Packard Instrument Co., Inc. PCR, Inc. Pfaltz & Bauer, Inc. Phy-Lab Polysciences, Inc. Princeton Organics, Inc. Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. Research Products International Corp. Spectrum Medical Industries, Inc. VAR-LAC-OID Chemical Co.

spectrographic Allied Chemical Corp. Alpha Metals, Inc. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Apache Chemicals, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Bodman Chemicals Brinkmann Instruments, Inc. Cannon Instrument Co. Carnegie-Mellon University CCM: Schaar Scientific, Inc. Chemical Samples Co. City Chemical Corp. A. Daigger & Co. Eastman Kodak Co., Eastman Organic Chemicals Electronic Space Products, Inc. The Harshaw Chemical Co. Heico, Inc. Hruden Laboratory Products JarreN-Ash Div. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Merck Chemical Met-Bay, Inc. National Spectrographic Laboratories, Inc. PCR. Inc. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Prolabo Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. Rockland Instrument Corp. Semi-Elements, Inc. Spex Industries, Inc. Union Carbide Corp., Carbon Products Div. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products Wilmad Glass Co., Inc. Zeebac Inc.

spectrophotometric Achem Div, Aldrich Chemical Co., Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Anderson Laboratories, Inc. Apache Chemicals, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Brinkmann Instruments, Inc. G. F. Bush Associates Calbiochem Carnegie-Mellon University Chem Service, Inc. City Chemical Corp. Coleman Instruments Corco Chemical Corp. Corning Glass Works (Mass.) A. Daigger & Co. Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A. Hach Chemical Co. Harleco James Hinton Hruden Laboratory Products Hyland Instrumentation Laboratory Inc. Jarrell-Ash Div. Lachat Chemicals, Inc. LaMont Laboratories LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Merck Chemical PCR, Inc.

Pfaltz & Bauer, Inc. Phillips Petroleum Co. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Prolabo Reliable Chemical Co. Scientific Gas Products Inc. Sigma Chemical Co. Sircor Instruments Corp. G. Frederick Smith Chemical Co. Southwestern Analytical Chemicals, Inc. VWR Scientific

standard solutions Ace Scientific Supply Co., Inc. Advanced Instruments, Inc. Allied Chemical Corp. Alpha Metals, Inc. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Andor Chemical Corp., Apache Chemicals, Inc. Applied Science Labs., Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Bio-Med-Chem Co. Bio-Rad Laboratories Brinkmann Instruments, Inc. Calbiochem Central Scientific Co. Chem Service, Inc. City Chemical Corp. Coleman Instruments Corco Chemical Corp. Corning Glass Works (Mass.) Curtin Scientific Co. A. Daigger & Co. Delta Scientific Corp. Eastern Chemical EM Laboratories, Inc. Carlo Erba S.p.A. F & J Scientific Fermco Laboratories Fisher Scientific Co. Fiske Associates, Inc. General Biochemicals Hach Chemical Co. Harleco Hellige, Inc. Hruden Laboratory Products ICN Chemical & Radioisotope Div. Instrumentation Laboratory Inc. Jarrell-Ash Div. Lachat Chemicals, Inc. LaMotte Chemical Products Co. LaPine Scientific Co. Lithium Corp. of America The London Co. Mallinckrodt Chemical Works, Science Products Div. Medical Chemical Corp. Miles Labs, Inc., Research Div. (III.) Nanogens New England Nuclear Nuclear Equipment Chemical Corp. Omega Chemical Corp. Packard Instrument Co., Inc. Perco Supplies Pfaltz & Bauer, Inc. Phase Separations Ltd. Phillips Petroleum Co. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Precision Gas Products, Inc. Prolabo Rankin Reagent Co. Regis Chemical Co. Reliable Chemical Co. Scientific Gas Products Inc. Scientific Products Sigma Chemical Co. Sircor Instruments Corp. G. Frederick Smith Chemical Co. Spectrogram Corp. Stewart Laboratories, Inc. Technicon Instruments Corp. VWR Scientific

static eliminators Electronic Space Products, Inc. Greiner Scientific Corp. TheC. P. Hall Co. of Illinois Industrial Formulations Corp. 3M Co., Nuclear Products Dept. Nuclear Products Co. Phipps & Bird, Inc.

Apache Chemicals, Inc. Applied Science Labs., Inc. Arapahoe Chemicals J. T. Baker Chemical Co. BDH Chemicals Brinkmann Instruments, Inc. Chem Service, Inc. City Chemical Corp. Columbia Organic Chemicals Co., Inc. A. Daigger & Co. Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Henley & Co., Inc. Hyland New England Nuclear Pfaltz & Bauer, Inc. Pierce Chemical Co. Reliable Chemical Co. Schwarz/Mann Searle Chemicals, Inc. Sigma Chemical Co. Supelco, Inc. The Upjohn Co., Fine Chemical Marketing

transistor (semiconductor) Air Products & Chemicals, Inc. Allen-Jones Electronics Allied Chemical Corp. Anachemia Chemicals, Inc. Apache Chemicals, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. BDH Chemicals City Chemical Corp. Eagle-Picher Industries, Inc. EM Laboratories, Inc. Carlo Erba S.p.A. Hi-Temp Glass Products, Inc. Hruden Laboratory Products Hughes Aircraft Co. K& Κ Labs.. Inc. LaMont Laboratories Mallinckrodt Chemical Works, Science Products Div. Materials Development Corp. Matheson Gas Products Merix Chemical Co. Nitine, Inc. PCR, Inc. Phy-Lab Prolabo Reliable Chemical Co. Rocky Mountain Research, Inc. Scientific Gas Products Inc. Semi-Elements, Inc. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products

ultrasonic cleaning Allied Chemical Corp. Beckman Instruments, Inc. The BendixCorp. Blackstone Ultrasonics, Inc. Branson Instruments Co. Castle Co. Chemical & Solvent Distillers Co., Inc. Crest Ultrasonics Corp. A. Daigger & Co. Dero Research & Development Corp. Detrex Chemical Industries, Inc. E. I. du Pont de Nemours & Co., Inc. Dynasonics Corp. Esterline Angus Forest Scientific, Inc. Geoscience Instruments Corp. Giannini Controls Greiner Scientific Corp. Harleco International Products Corp. Lab-Items Associates L & R Manfacturing Co. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Molectrics, Inc. Nuclear Equipment Chemical Corp. Phillips Manufacturing Co. Phy-Lab Polysciences, Inc. Research Appliance Co. Sara-Sonic Co. Sonicor Instrument Corp. Sunshine Chemical Corp. Tect, Inc. Ultrasonic Instruments International Ltd. VWR Scientific Wave Energy Systems, Inc.

steroids ultraviolet absorbing Aldrich Chemical Co., Inc. Analabs, Inc.

J. T. Baker Chemical Co. Chem Service, Inc.

LABORATORY

GUID

Chemicals, ultraviolet absorbing Desiccants Ciba-Geigy Corp. Ferro Corp., Chemical Div. GAF Corp., Chemical Div. M. W. Hardy & Co., Inc. Merck Chemical Merix Chemical Co. Nease Chemical Co., Inc. Phy-Lab Polysciences, Inc. Reliable Chemical Co. Sigma Chemical Co. VAR-LAC-OID Chemical Co.

wetting agents Allied Chemical Corp. American Minechem Corp. Anachemia Chemicals, Inc. Anderson Laboratories, Inc. Baker Castor Oil Co. J. T. Baker Chemical Co. Chem Service, Inc.

Ciba-Geigy Corp.

A. Daigger & Co. GAF Corp., Chemical Div. TheC. P. Hall Co. of Illinois M. W. Hardy & Co., Inc. Harleco Hyland Instrumentation Laboratory Inc. Johnson-March Corp. Lachat Chemicals, Inc. Lithium Corp. of America The London Co. Mallinckrodt Chemical Works, Science Products Div. Nopco Chemical Div. Pfaltz & Bauer, Inc. Phipps& Bird, Inc. Reliable Chemical Co. Sigma Chemical Co. Sunshine Chemical Corp. Technicon Instruments Corp. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics

zone refined Aldrich Chemical Co., Inc. Analabs, Inc. Anderson Physics Labs., Inc. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. BDH Chemicals Chemical Samples Co. City Chemical Corp. Columbia Organic Chemicals Co., Inc. CTESylvania Inc. Eagle-Picher Industries, Inc. Electronic Space Products, Inc. Carlo Erba S.p.A. D. F. Goldsmith Chemical & Metal Corp. James Hinton Hruden Laboratory Products LaPine Scientific Co. Materials Research Corp. Pfaltz & Bauer, Inc. Princeton Organics, Inc. Reliable Chemical Co. Rocky Mountain Research, Inc. Semi-Elements, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products

CLINICAL REAGENTS — see reagents, clinical COMPOUNDS, deuterium Aldrich Chemical Co., Inc. Analabs, Inc. J. T. Baker Chemical Co. Bio-Rad Laboratories Brinkmann Instruments, Inc. Calbiochem City Chemical Corp. Columbia Organic Chemicals Co., Inc. Diaprep, Inc. EM Laboratories, Inc. Carlo Erba S.p.A. ICN Chemical & Radioisotope Div. Isomet Corp. K & K Labs., Inc. Mallinckrodt Chemical Works, Science Products Div. Marshallton Research Labs., Inc. Matheson Gas Products Merck Sharp & Dohme Canada Ltd. Merck Chemical Miles Labs, Inc., Research Div. (III.)

Milton Roy Co. Norell Chemical Co., Nuclear Equipment Chemical Corp. Nutritional Biochemicals Organomation Associates, Inc. PCR, Inc. Pfaltz & Bauer, Inc. Phase Separations Ltd. SAS Scientific Chemicals, Ltd. Schwarz/Mann Scientific Gas Products Inc. Stohler Isotope Chemicals, Inc. Ventron Corp., Alfa Products

COMPOUNDS, HIGH PURITY inorganic Allied Chemical Corp. Alpha Metals, Inc. Amend Drug & Chemical Co., Inc. American Potash & Chemical Corp. Anachemia Chemicals, Inc. Analabs, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Barium and Chemicals, Inc. Bodman Chemicals Brinkmann Instruments, Inc. Cerac, Inc. Chem Service, Inc. Chemicals Procurement Labs., Inc.

City Chemical Corp.

Corco Chemical Corp. CTE Sylvania Inc. A. Daigger & Co. Dead Sea Works Corp. Electronic Space Products, Inc. EM Laboratories, Inc. Engineered Materials Carlo Erba S.p.A. Fairmount Chemical Co., Inc. Fielding Chemical Co. Fisher Scientific Co. Freeman Industries, Inc. Gallard-Schlesinger Chemical Mfg. Corp. D. F. Goldsmith Chemical & Metal Corp. M. W. Hardy & Co., Inc. Harleco The Harshaw Chemical Co. Heico, Inc. Hruden Laboratory Products ICN Chemical & Radioisotope Div. International Salt Co. Jarrell-Ash Div. Kawecki Berylco Industries, Inc. Kennametal Inc. LaPine Scientific Co. Lithium Corp. of America Lunex Co. Mallinckrodt Chemical Works, Science Products Div. Materials Research Corp. MCB Manufacturing Chemists Medical Chemical Corp. Merix Chemical Co. Mine Safety Appliances Co. MSA Research Corp. Nuclear Equipment Chemical Corp. Omega Chemical Corp. Ozark-Mahoning Co. PCR, Inc. Pfaltz & Bauer, Inc. Pfizer Minerals, Pigments & Metals Div. Phase Separations Ltd. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Precision Gas Products, Inc. Pressure Chemical Co. Prolabo Reliable Chemical Co. Research Chemicals Research Organic/Inorganic Chemical Corp. Rocky Mountain Research, Inc. SAS Scientific Chemicals, Ltd. Schwarz/Mann Scientific Gas Products Inc. Semi-Elements, Inc. Southwestern Analytical Chemicals, Inc. Spex Industries, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products VWR Scientific Xtalonix Products

organic Aldrich Chemical Co., Inc. Allied Chemical Corp. The Ames Laboratories, Inc.

Anachemia Chemicals, Inc. Analabs, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Applied Science Labs., Inc. Aremco Products, Inc. Atomergic Chemetals Co. J. T. Baker Chemical Co. The Borden Chemical Co. Brinkmann Instruments, Inc. Carbolabs, Inc. Carnegie-Mellon University Chem Service, Inc. Chemical Data Systems, Inc. Chemical Samples Co. Chemicals Procurement Labs., Inc. City Chemical Corp. Columbia Organic Chemicals Co., Inc. Cudahy Labs. Cyclo Chemical A. Daigger & Co. Dead Sea Works Corp, Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Electronic Space Products, Inc. Carlo Erba S.p.A. Farchan Research Labs. Fielding Chemical Co. Fine Organics, Inc. Fisher Scientific Co. Fox Chemical Co. Freeman Industries, Inc. Frinton Labs. Gallard-Schlesinger Chemical Mfg. Corp. M. W. Hardy & Co., Inc. Harleco The Harshaw Chemical Co. Heico, Inc. James Hinton Hruden Laboratory Products The Humphrey Chemical Co. ICN Chemical & Radioisotope Div. H. J. Jensen, Inc. Lachat Chemicals, Inc. LaPine Scientific Co. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. Materials Research Corp. MCB Manufacturing Chemists Medical Chemical Corp. Miles Labs., Inc. Nease Chemical Co., Inc. New England Nuclear New Haven Chemical Corp. Nuclear Equipment Chemical Corp. Nutritional Biochemicals Omega Chemical Corp. Packard Instrument Co., Inc PCR, Inc. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phillips Petroleum Co. Phy-Lab Pierce Chemical Co. PollardS Co. PolyScience Corp. Polysciences, Inc. Precision Gas Products, Inc. Pressure Chemical Co. Princeton Organics, Inc. Prolabo Regis Chemical Co. Reheis Chemical Co. Reilly Tar & Chemical Corp. Reliable Chemical Co, Research Organic/Inorganic Chemical Corp. RHO Chemical Co. Saber Labs., Inc. SAS Scientific Chemicals, Ltd. Schwarz/Mann Scientific Gas Products Inc. The Selney Co., Inc. Sigma Chemical Co. Southwestern Analytical Chemicals, Inc. Specialty Organics, Inc. Story Chemical Corp. Supelco, Inc. Syva Co. Union Carbide Corp., Chemicals & Plastics VWR Scientific Willow Brook Laboratories, Inc. Wilmad Glass Co., Inc. Winthrop Laboratories

zone refined Aldrich Chemical Co., Inc. Allen-Jones Electronics Analabs, Inc. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Brinkmann Instruments, Inc. Chemical Samples Co. City Chemical Corp. Columbia Organic Chemicals Co., Inc.

5

Eagle-Picher Industries, Inc. Electronic Space Products, Inc. Carlo Erba S.p.A. Gallard-Schlesinger Chemical Mfg. Corp. James Hinton Hruden Laboratory Products Materials Research Corp. Pfaltz & Bauer, Inc. Princeton Organics, Inc. Reliable Chemical Co. Rocky Mountain Research, Inc. Semi-Elements, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co.

COMPRESSED GASES, GAS MIXTURES, AND RARE GASES AIRCO, Inc. AIRCO Industrial Gases Air Lab, Inc. Air Products & Chemicals, Inc. Analabs, Inc. Analytical Instrument Development, Inc. Bio-Rad Laboratories Chemetron Corp., Industrial-Medical Gases Chemicals Procurement Labs., Inc. City Chemical Corp. Corning Glass Works (Mass.) Fisher Scientific Co. Gardner Cryogenics Corp. Houston-Atlas, Inc. Instrumentation Laboratory Inc. International Minerals & Chemical Corp. LaPine Scientific Co. Lif-O-Gen, Inc. Liquid Carbonic Corp. The London Co. Matheson Gas Products Merck Chemical MG Scientific Gases John P. Mickel Associates, Inc. Ohio Medical Products Olson Laboratories, Inc. Ozark-Mahoning Co. PCR, Inc. Petrarch Systems Phase Separations Ltd. Phillips Petroleum Co. Precision Gas Products, Inc. Quantum Physics, Inc. Rank Precision Industries Research Organic/Inorganic Chemical Corp. Rocky Mountain Research, Inc. Scientific Gas Products Inc. Scott Research Laboratories, Inc. Superior Air Products Co. Thermco Instrument Corp. Union Carbide Corp., Linde Div. Union Carbide Corp., Chemicals & Plastics VWR Scientific

CUSTOM & RESEARCH SERVICES — s e e Section 7 DESICCANTS Air Products & Chemicals, Inc. Allied Chemical Corp. Alltech Associates, Inc. Aluminum Company of America Amend Drug & Chemical Co., Inc. Analabs, Inc. J. T. Baker Chemical Co. Barium and Chemicals, Inc. Barnebey-Cheney Co. CCM: Schaar Scientific, Inc. City Chemical Corp. Coast Engineering Laboratory Coleman Instruments A. Daigger & Co. Engelhard Minerals & Chemicals Corp., Minerals & Chemicals Div. Engelhard Minerals & Chemicals Corp., Engelhard Industries Div. Carlo Erba S.p.A. Fisher Scientific Co. Floridin Co. Gallard-Schlesinger Chemical Mfg. Corp W. R. Grace &Co. Greiner Scientific Corp. W. A. Hammond Drierite Co. Kahn &Co., Inc. Kaufman Glass Co. LaPine Scientific Co. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Merix Chemical Co. MG Scientific Gases Multiform Desiccant Products, Inc.

AUGUST 1972 297 LG

5 Ί

5

Des ice ants Indicators, volumetric

PCR, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab G. Frederick Smith Chemical Co. Arthur H. Thomas Co. Thompson Hayward Chemical Co. Union Carbide Corp., Materials Systems Div. Union Carbide Corp., Molecular Sieve Dept. United Mineral & Chemical Corp. VWR Scientific Wilkerson Corp.

DYES, fluorescent

5

Achem Div. Aldrich Chemical Co., Inc. Allied Chemical Corp. American Gas & Chemicals, Inc. J. T. Baker Chemical Co. BioQuest The Borden Chemical Co. Calbiochem Ciba-Geigy Corp. City Chemical Corp. Colorado Serum Co. A. Daigger & Co. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Fisher Scientific Co. Fiske Associates, Inc. Gallard-Schlesinger Chemical Mfg. Corp. Harleco James Hinton LaPine Scientific Co. MCB Manufacturing Chemists Nutritional Biochemicals Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Regis Chemical Co. Reliable Chemical Co. Scientific Manufacturing Industries Sigma Chemical Co. VAR-LAC-OID Chemical Co. VWR Scientific

ELECTRONIC GRADE CHEMICALS — s e e chemicals ELECTRONIC GRADE REAGENTS — s e e reagents ELEMENTS high purity AIRCO Industrial Gases Air Products & Chemicals, Inc. Allied Chemical Corp. Alpha Metals, Inc. Alusuisse Metals Inc. Amend Drug & Chemical Co., Inc. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Cerac, Inc. City Chemical Corp. Corco Chemical Corp. Dead Sea Works Corp. E. I. du Pont de Nemours & Co., Inc. Eagle-Picher Industries, Inc. Electronic Space Products, Inc. Engelhard Minerals & Chemicals Corp., Engelhard Industries Div. Engineered Materials Fisher Scientific Co. D. F. Goldsmith Chemical & Metal Corp. Goldsmith Precious Metals Div. Henley & Co., Inc. Hruden Laboratory Products ICN Chemical & Radioisotope Div. Image Analysing Computers, Inc. Imanco-Metals Research Jarrell-Ash Div. Kawecki Berylco Industries, Inc. Kennametal Inc. Morris P. Kirk &Son, Inc. LaPine Scientific Co. Lithium Corp. of America Lunex Co. Materials Research Corp. Matheson Gas Products MCB Manufacturing Chemists Michigan Chemical Corp. MSA Research Corp. Ν L Industries, Inc., Metal Div.

300 LG AUGUST 1972

Nuclear Equipment Chemical Corp. Nuclear Materials & Equipment Corp. PCR, Inc. Phase Separations Ltd. Polysciences, Inc. Precision Gas Products, Inc. Prolabo Pure Carbon Co., Inc. Reliable Chemical Co. Research Chemicals Research Organic/Inorganic Chemical Corp. Rockland Instrument Corp. Rocky Mountain Research, Inc. SAS Scientific Chemicals, Ltd. Scientific Gas Products Inc. Semi-Elements, Inc. Spex Industries, Inc. Ultra Carbon Corp. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products Wilkerson Corp. Wood Ridge Chemical Corp.

Bio-Rad Laboratories Coast Engineering Laboratory Engelhard Minerals & Chemicals Corp., Minerals & Chemicals Div. Isolab, Inc. LaPine Scientific Co. Pharmacia Fine Chemicals, Inc. Phase Separations Ltd. Waters Associates Inc.

FREE RADICALS Aldrich Chemical Co., Inc. Frinton Labs.

GAS ABSORBENTS — see absorbents, gas GASES — see gases

compressed

radioactive Aerotest Operations American Nuclear Corp. Amersham/Searle Corp. Atomic Energy of Canada Ltd. Baird-Atomic, Inc. Cambridge Nuclear Corp. Cerac, Inc. Controlled Atmosphere, Inc. General Electric Co., Irradiation Processing Operation Gulf Radiation Technology ICN Chemical & Radioisotope Div. Isolab, Inc. Mallinckrodt Chemical Works, Science Products Div. Mallinckrodt/Nuclear New England Nuclear Nuclear Associates, Inc. Nuclear Equipment Chemical Corp. Nuclear Materials & Equipment Corp. Nuclear Medical Systems, Inc. Nuclear Semiconductor, Inc. Nucleonic Corp. of America Radiation Materials Co., Inc. Schwarz/Mann Scientific Gas Products Inc. Stonier Isotope Chemicals, Inc. Union Carbide Corp., Sterling Forest Research Center

ENZYMES, purified Alpine Geophysical Associates, Inc. Amend Drug & Chemical Co., Inc. Beckman Instruments, Inc. Biochemical & Nuclear Corp. Biopolymers Laboratory of General Biochemicals Boehringer Mannheim Corp. Brinkmann Instruments, Inc. Calbiochem Chemicals Procurement Labs., Inc. City Chemical Corp. Colab Labs., Inc. Cudahy Labs. A. Daigger & Co. EM Laboratories, Inc. Fermco Laboratories Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Harleco Henley & Co., Inc. Hyland ICN Chemical & Radioisotope Div. LaPine Scientific Co. Maurukas Co., Inc. Miles Labs, Inc., Research Div. (III.) Miles Labs., Inc. Monsanto Co. Nutritional Biochemicals Pfaltz & Bauer, Inc. Pfanstiehl Labs, Inc. Phase Separations Ltd. Phy-Lab P-L Biochemicals. Inc. Polysciences, Inc. Reheis Chemical Co. Reliable Chemical Co. Schwarz/Mann Sigma Chemical Co. Supelco, Inc. Wallerstein Co. Worthington Biochemical Corp.

FILTER GEL Air Products & Chemicals, Inc. Aldrich Chemical Co., Inc. Aluminum Company of America Analabs, Inc.

INDICATORS chemical Achem Div. Aldrich Chemical Co., Inc. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Applied Science Labs., Inc. J. T. Baker Chemical Co. Betz Laboratories, Inc. Calbiochem CCM: Schaar Scientific, Inc. Chem Service, Inc. City Chemical Corp. Coast Engineering Laboratory Corco Chemical Corp. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A. Fielding Chemical Co. Fine Organics, Inc. Fisher Scientific Co. The Foxboro Co. Freeman Industries, Inc. Gallard-Schlesinger Chemical Mfg. Corp. Greiner Scientific Corp. Hach Chemical Co. Harleco ICN Chemical & Radioisotope Div. ITT Barton K & Κ Labs., Inc. Kings Laboratories Koslow Scientific Co. LaMont Laboratories LaMotte Chemical Products Co. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Martin-Decker Co. MCB Manufacturing Chemists Medical Chemical Corp. MG Scientific Gases Milton Roy Co. Nutritional Biochemicals Omega Chemical Corp. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Pierce Chemical Co. Prolabo Reliable Chemical Co. Scientific Products Sigma Chemical Co. Sircor Instruments Corp. G. Frederick Smith Chemical Co. Smith-Underwood Laboratories United States Testing Co., Inc. VWR Scientific

PH Ace Scientific Supply Co., Inc. Achem Div. Aldrich Chemical Co., Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Amstro Corp. Anachemia Chemicals, Inc. Analytical Measurements, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. J. T. Baker Chemical Co. Betz Laboratories, Inc. CCM: Schaar Scientific, Inc. City Chemical Corp. Corco Chemical Corp.

Corning Glass Works (N.Y.) Corning Glass Works (Mass.) A. Daigger & Co. Delta Scientific Corp. Difco Laboratories Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Elnik Instruments, Inc. EM Laboratories, Inc. Carlo Erba S.p.A. Fielding Chemical Co. Fine Organics, Inc. Fisher Scientific Co. The Foxboro Co. Gallard-Schlesinger Chemical Mfg. Corp. General Biochemicals Greiner Scientific Corp. Hach Chemical Co. Harleco Hellige, Inc. Honeywell, Inc., Industrial Div. ICN Chemical ^Radioisotope Div. Kent Instrument Corp. Kings Laboratories LaMotte Chemical Products Co. LaPine Scientific Co. Leeds & Northrup Co. The London Co. Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Medical Chemical Corp. MG Scientific Gases Nutritional Biochemicals Oxyphen Products Co. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Prolabo H. Reeve Angel & Co., Inc. Reliable Chemical Co. Scientific Products Sigma Chemical Co. Sircor Instruments Corp. Smith-Underwood Laboratories VWR Scientific

test papers indicators pH Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. J. T. Baker Chemical Co. Brinkmann Instruments, Inc. Calbiochem R. P. Cargille Labs., Inc. CCM: Schaar Scientific, Inc. A. Daigger & Co. EM Laboratories, Inc. Carlo Erba S.p.A. Fil-Chem, Inc. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Greiner Scientific Corp. Harleco ICN Chemical & Radioisotope Div. LaMotte Chemical Products Co. LaPine Scientific Co. MG Scientific Gases Nutritional Biochemicals Oxyphen Products Co. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Prolabo H. Reeve Angel & Co., Inc. Rhodia, Inc. Schleicher & Schuell, Inc. VWR Scientific

volumetric Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. J. T. Baker Chemical Co. Corco Chemical Corp. Delta Scientific Corp. Carlo Erba S.p.A. Fisher Scientific Co. The Foxboro Co. Gallard-Schlesinger Chemical Mfg. Corp. Greiner Scientific Corp. Harleco LaMotte Chemical Products Co. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Medical Chemical Corp. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Reliable Chemical Co. Research Appliance Co. Sircor Instruments Corp. G. Frederick Smith Chemical Co. Smith-Underwood Laboratories VWR Scientific

LABORATORY GUIDE

5

Ion Exchange Chemicals, celluloses Metals, refractory

ION EXCHANGE CHEMICALS celluloses Applied Science Labs., Inc. J. T. Baker Chemical Co. Bio-Rad Laboratories Brinkmann Instruments, Inc. Calbiochem Cyclo Chemical EM Laboratories, Inc. Gallard-Schlesinger Chemical Mfg. Corp. General Biochemicals LaPine Scientific Co. Nutritional Biochemicals Pfaltz& Bauer, Inc. Phipps & Bird, Inc. H. Reeve Angel & Co., Inc. Regis Chemical Co. Reliable Chemical Co. Schleicher & Schuell, Inc. Schwarz/Mann Sigma Chemical Co. Supelco, Inc. VWR Scientific

resins

5

Allied Chemical Corp. Amend Drug & Chemical Co., Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Betz Laboratories, Inc. Bio-Cal Instrument Co. Bio-Rad Laboratories Brinkmann Instruments, Inc. Calbiochem CCM: Schaar Scientific, Inc. Corning Glass Works (Mass.) Crystalab, Inc. Culligan International Co. Cyclo Chemical A. Daigger & Co. E. I. du Pont de Nemours & Co., Inc. Durrum Chemical Corp. Durrum Instrument Corp. EM Laboratories, Inc. Carlo Erba S.p.A. ICN Chemical & Radioisotope Div. Illinois Water Treatment Co. lonac Chemical Co. Ionics, Inc. LaMotte Chemical Products Co. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Monsanto Co. Pfaltz& Bauer, Inc. Pharmacia Fine Chemicals, Inc. Phipps & Bird, Inc. Pierce Chemical Co. Polysciences, Inc. Prolabo Regis Chemical Co. Reliable Chemical Co. RePPDiv. The VirTis Co. Resource Control, Inc. Rohm and Haas Co. The Separations Group Sigma Chemical Co. Technicon Instruments Corp. Varian Aerograph VWR Scientific

ION EXCHANGE CRYSTALS Bio-Rad Laboratories Fisher Scientific Co. lonac Chemical Co. LaPine Scientific Co. Norton Co. (Mass) Reliable Chemical Co. Resource Control, Inc.

ISOTOPES — see isotope

chemicals,

ISOTOPES, radioactive — see labeled or tagged organic compounds ISOTOPES, stable Atomergic Chemetals Co. Bio-Rad Laboratories Controlled Atmosphere, Inc. Diaprep, Inc. General Electric Co. ICN Chemical & Radioisotope Div.

302 LG AUGUST 1972

Isomet Corp. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Mallinckrodt/Nuclear Merck Sharp & Dohme Canada Ltd. Merck Chemical MG Scientific Gases Miles Labs, Inc., Research Div. (III.) Miles Labs., Inc. New England Nuclear Norell Chemical Co., Nuclear Equipment Chemical Corp. SAS Scientific Chemicals, Ltd. Schwarz/Mann Scientific Gas Products Inc. Stohler Isotope Chemicals, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co.

KITS, chemical reaction kits (teaching) Achem Div. Alpha Associates Ames Co. Calbiochem Cambridge Nuclear Corp. Chem Service, Inc. Chemical Samples Co. Colab Labs., Inc. Corning Glass Works (N.Y.) Delta Scientific Corp. E. I. du Pont de Nemours & Co., Inc. Gelman Instrument Co. General Kinetics Gould, Inc., Burgess Div. Hach Chemical Co. Harleco Hyland InterexCorp. Koslow Scientific Co. LaMotte Chemical Products Co. LaPine Scientific Co. Lyne Labs, Inc. Mallinckrodt Chemical Works, Science Products Div. Maurukas Co., Inc. Medical Chemical Corp. Nuclear Medical Systems, Inc. Ohaus Scale Corp. Pharmacia Fine Chemicals, Inc. Phase Separations Ltd. Phy-Lab Polysciences, Inc. Power Applications, Inc. Quantum Industries Regis Chemical Co. Science Related Materials, Inc. Sigma Chemical Co. Smith-Underwood Laboratories Spectrum Medical Industries, Inc. Stewart Laboratories, Inc. Supelco, Inc.

LABELED OR TAGGED ORGANIC COMPOUNDS isotopes (radioactive, low level and high level radioactive) AIRCO Industrial Gases American Nuclear Corp. Amersham/Searle Corp. Ames Co. Atomic Energy of Canada Ltd. Biochemical & Nuclear Corp. Calbiochem Cambridge Nuclear Corp. Canrad Precision Industries, Inc. Controlled Atmosphere, Inc. Eberline Instrument Corp. General Electric Co., Irradiation Processing Operation The Harshaw Chemical Co. High Voltage Engineering Corp. ICN Chemical & Radioisotope Div. Industrial Reactor Labs., Inc. Isolab, Inc. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Mallinckrodt/Nuclear Matheson Gas Products MCB Manufacturing Chemists Miles Labs, Inc., Research Div. (III.) Miles Labs., Inc. New England Nuclear Nuclear Associates, Inc. Nuclear Equipment Chemical Corp. Nuclear Medical Systems, Inc. Nucleonic Corp. of America ORTEC Incorporated Packard Instrument Co., Inc. Radiation Materials Co., Inc.

Schwarz/Mann Scientific Gas Products Inc. Spectrum Medical Industries, Inc. Stohler Isotope Chemicals, Inc. U. S. Nuclear Corp.

radioactive compounds Amersham/Searle Corp. Ames Co. Applied Science Labs., Inc. Biochemical & Nuclear Corp. Calbiochem Cambridge Nuclear Corp. Canrad Precision Industries, Inc. Controlled Atmosphere, Inc. Eberline Instrument Corp. Fox Chemical Co. General Electric Co., Irradiation Processing Operation ICN Chemical & Radioisotope Div. Isolab, Inc. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Mallinckrodt/ Nuclear Matheson Gas Products MG Scientific Gases Miles Labs, Inc., Research Div. (III.) Mites Labs., Inc. New England Nuclear Nuclear Equipment Chemical Corp. Nuclear Medical Systems, Inc. Nucleonic Corp. of America Packard Instrument Co., Inc. Radiation Materials Co., Inc. Schwarz/Mann Spectrum Medical Industries, Inc. Stohler Isotope Chemicals, Inc. Unilab Research Corp. U. S. Nuclear Corp. Worthington Biochemical Corp.

LABORATORY SERVICES see services, analytical LIQUEFIED GASES — see compressed gases MAGNETIC ALLOYS, ultra—high purity Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. Carpenter Technology Corp. A. Daigger & Co. Engelhard Minerals & Chemicals Corp., Engelhard Industries Div. Imanco-Metals Research LaPine Scientific Co. Materials Research Corp. Reliable Chemical Co. Research Chemicals Rocky Mountain Research, Inc. VAR-LAC-OID Chemical Co. Xtalonix Products

METAL FOIL Allied Chemical Corp. Alpha Metals, Inc. Aluminum Company of America Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Carpenter Technology Corp. Cerac, Inc. Chemicals Procurement Labs., Inc. City Chemical Corp. Consolidated Aluminum Corp. A. Daigger & Co. Electronic Space Products, Inc. Engineered Materials Fairmount Chemical Co., Inc. D. F. Goldsmith Chemical & Metal Corp. Goodfellow Metals Ltd. Greiner Scientific Corp. Hruden Laboratory Products Hy-Sil Manufacturing Co. Imanco-Metals Research Kawecki Berylco Industries, Inc. Lunex Co. Materials Research Corp. Matthey Bishop, Inc. MCB Manufacturing Chemists Ney Metals, Inc. Ν L Industries, Inc., Nuclear Div.

Nuclear Equipment Chemical Corp. Nuclear Materials & Equipment Corp. PCR, Inc. Pfaltz Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Polysciences, Inc. Prolabo Reactor Experiments, Inc. Reliable Chemical Co. Research Chemicals Semi-Elements, Inc. Texas Instruments, Inc., Control Product Div. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products

METALS, high purity—see also rare earth metals Alpha Metals, Inc. Aluminum Company of America Alusuisse Metals Inc. Amend Drug & Chemical Co., Inc. American Potash & Chemical Corp. American Smelting & Refining Co. Anachemia Chemicals, Inc. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. BDH Chemicals The Bendix Corp., Scientific Instruments & Equipment Div. Bethlehem Apparatus Co., Inc. Carpenter Technology Corp. Cerac, Inc. Chemicals Procurement Labs., Inc. City Chemical Corp. Consolidated Aluminum Corp. A. Daigger & Co. Eagle-Picher Industries, Inc. Electronic Space Products, Inc. Engineered Materials Fairmount Chemical Co., Inc. Glidden-Durkee D. F. Goldsmith Chemical & Metal Corp. Goldsmith Precious Metals Div. Goodfellow Metals Ltd. M. W. Hardy & Co., Inc. Henley & Co., Inc. Hruden Laboratory Products Imanco-Metals Research Jarrell-Ash Div. K & K Labs., Inc. Kawecki Berylco Industries, Inc. Morris P. Kirk & Son, Inc. LaPine Scientific Co. Lithium Corp. of America Lunex Co. Materials Research Corp. Michigan Chemical Corp. Mine Safety Appliances Co. MSA Research Corp. Ney Metals, Inc. Ν L Industries, Inc., Metal Div. Nuclear Elements Corp. Nuclear Equipment Chemical Corp. Nuclear Materials & Equipment Corp. PCR, Inc, PfaltzS Bauer, Inc. Pfizer Minerals, Pigments & Metals Div. Phase Separations Ltd. Phy-Lab Polysciences, Inc. Prolabo Reactor Experiments, Inc. Reliable Chemical Co. Research Chemicals Research Organic/Inorganic Chemical Corp. Rocky Mountain Research, Inc. Scientific Gas Products Inc. Semi-Elements, Inc. Spex Industries, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products Wood Ridge Chemical Corp.

METALS, refractory Alusuisse Metals Inc. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. Cerac, Inc. City Chemical Corp. CTE Sylvania Inc. Electronic Space Products, Inc. Engineered Materials Goodfellow Metals Ltd. Hruden Laboratory Products Imanco-Metals Research Kawecki Berylco Industries, Inc. Kennametal Inc.

LABORATORY GUIDE

5

Metals, refractory Prepared Standard Solutions, solutions

LaPine Scientific Co. Lunex Co. Materials Research Corp. Norton Co., Metals Div. Nuclear Materials & Equipment Corp. PCR, Inc. Reliable Chemical Co. Research Chemicals Research Organic/Inorganic Chemical Corp. Rocky Mountain Research, Inc. Semi-Elements, Inc. Spex Industries, Inc. Chas. Taylor Sons Co. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products

METALS AND ALLOYS, precious

5

Alpha Metals, Inc. Amend Drug & Chemical Co., Inc. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. Cerac, Inc. City Chemical Corp. A. Daigger & Co. E. I. du Pont de Nemours & Co., Inc. Electronic Space Products, Inc. Engelhard Minerals & Chemicals Corp., Engelhard Industries Div. Engineered Materials D. F. Goldsmith Chemical & Metal Corp. Goldsmith Precious Metals Div. Goodfellow Metals Ltd. Hruden Laboratory Products Imanco-Metals Research LaPine Scientific Co. Lithium Corp. of America Materials Research Corp. Matthey Bishop, Inc. MCB Manufacturing Chemists PCR, Inc. Polysciences, Inc. Prolabo Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. SAS Scientific Chemicals, Ltd. TheSel-RexCo. Semi-Elements, Inc. Spex Industries, Inc. Structure Probe, Inc. Technic, Inc. Texas Instruments, Inc., Control Product Div. Tivian Laboratories, inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products

MICROSCOPY REAGENTS see reagents MOISTURE DETERMINATION APPARATUS — see chemicals, moisture determining NITROGEN AIRCO, Inc. AIRCO Industrial Gases Air Products & Chemicals, Inc. Armour Industrial Chemical Co. J. T. Baker Chemical Co. Chem Service, Inc. Chemetron Corp., Industrial-Medical Gases ICN Chemical & Radioisotope Div. LaPine Scientific Co. Lif-O-Gen, Inc. Liquid Carbonic Corp. Marshallton Research Labs., Inc. Matheson Gas Products Merck Chemical MG Scientific Gases Ohio Medical Products Precision Gas Products, Inc. Reliable Chemical Co. Scientific Gas Products Inc. Scott Research Laboratories, Inc. Superior Air Products Co. Union Carbide Corp., Linde Div. United Mineral & Chemical Corp.

304 LG AUGUST 1972

ORGANIC SYNTHESIS INTERMEDIATES Aero Chemical Corp. Aldrich Chemical Co., Inc. Allied Chemical Corp. The Ames Laboratories, Inc. Analabs, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Arapahoe Chemicals Ash Stevens Inc. Baker Castor Oil Co. J. T. Baker Chemical Co. BASF Corp. Bodman Chemicals The Borden Chemical Co. Burdick & Jackson Labs., Inc. Carbolabs, Inc. Chem Service, Inc. Chemical Samples Co. Chemicals Procurement Labs., Inc. City Chemical Corp. Columbia Organic Chemicals Co., Inc. Cyclo Chemical A. Daigger & Co. Dead Sea Works Corp. Detrex Chemical Industries, Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals El Monte Chemical Co. EM Laboratories, Inc. Fairmount Chemical Co., Inc. Farchan Research Labs. Ferro Corp., Chemical Div. Fine Organics, Inc. Fisher Scientific Co. FMC Corp., Organic & Inorganic Chemicals Div. Fox Chemical Co. Freeman Industries, Inc. Frinton Labs. GAF Corp., Chemical Div. General Biochemicals Hampshire Chemical M. W. Hardy & Co., Inc. The Humphrey Chemical Co. Hummel Chemical Co., Inc. ICN Chemical & Radioisotope Div. lonac Chemical Co. H. J. Jensen, Inc. K & Κ Labs., Inc. Krishell Laboratories, Inc. Lachat Chemicals, Inc. LaPine Scientific Co. M&T Chemicals Inc. Marshallton Research Labs., Inc. MCB Manufacturing Chemists Michigan Chemical Corp. Miles Labs, Inc., Research Div. (III.) Miles Labs., Inc. Mine Safety Appliances Co. MSA Research Corp. Nease Chemical Co., Inc. New Haven Chemical Corp. Nuclear Medical Systems, Inc. Nutritional Biochemicals Organomation Associates, Inc. Orgmet, Inc. The Ott Chemical Co. PCR, Inc. Pennwalt Corp. PfaltzA Bauer, Inc. Phase Separations Ltd. Phillips Petroleum Co. Pierce Chemical Co. Polysciences, Inc. Regis Chemical Co. Reilly Tar & Chemical Corp. Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. RHO Chemical Co. Saber Labs., Inc. Schwarz/Mann TheSelney Co., Inc. Sherwin Williams Chemicals Specialty Organics, Inc. Strem Chemicals, Inc. Tenneco Chemicals, Inc. Union Carbide Corp., Chemicals & Plastics The Upjohn Co., Fine Chemical Marketing Ventron Corp. Alfa Products Wateree Chemical Co., Inc. White Chemical Corp. WhittakerCorp. Willow Brook Laboratories, Inc. Winthrop Laboratories

ORGANOPHOSPHINES Bodman Chemicals Eastern Chemical Frinton Labs. M&T Chemicals Inc. Orgmet, Inc. PCR, Inc.

Petrarch Systems Pfaltz& Bauer, Inc. Pressure Chemical Co. Specialty Organics, Inc. Willow Brook Laboratories, Inc.

POWDERS, spectroscopic Apache Chemicals, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. City Chemical Corp. Electronic Space Products, Inc. EM Laboratories, Inc. F & J Scientific The Harshaw Chemical Co. Hruden Laboratory Products International Crystal Laboratories Jarrell-Ash Div. LaPine Scientific Co. Merck Chemical Met-Bay, Inc. National Spectrographic Laboratories, Inc. Poco Graphite, Inc. Reliable Chemical Co. Spex Industries, Inc. Ultra Carbon Corp. Union Carbide Corp., Carbon Products Div. United Mineral & Chemical Corp. Zeebac Inc.

PREPARED STANDARD SOLUTIONS (PRE-PACKED) chemicals Ace Scientific Supply Co., Inc. Allied Chemical Corp. Alpha Associates Anacherrua Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Applied Science Labs., Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Brinkmann Instruments, Inc. Chem Service, Inc. Chemical Data Systems, Inc. City Chemical Corp. Coleman Instruments Colorado Serum Co. Corco Chemical Corp. Cudahy Labs. A. Daigger & Co. Delta Scientific Corp. E. I. du Pont de Nemours & Co., Inc. Durrum Instrument Corp. Eastern Chemical Carlo Erba S.p.A. Fermco Laboratories Fisher Scientific Co. General Electric Co. Greiner Scientific Corp. Hach Chemical Co. Harleco Hellige, Inc. Hruden Laboratory Products Hyland ICN Chemical & Radioisotope Div. Isolab, Inc. Lachat Chemicals, Inc. LaMotte Chemical Products Co. LaPine Scientific Co. Lyne Labs, Inc. Mallinckrodt Chemical Works, Science Products Div. Materials Development Corp. Medical Chemical Corp. Nanogens Nitine, Inc. Nuclear Medical Systems, Inc. Omega Chemical Corp. Perco Supplies PfaltzS Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Prolabo Rankin Reagent Co. Regis Chemical Co. Reliable Chemical Co. SAS Scientific Chemicals, Ltd. Scientific Products Sigma Chemical Co. Sircor Instruments Corp. Technic, Inc. Technicon Instruments Corp. Untlab Research Corp. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. VWR Scientific

reagents Ace Scientific Supply Co., Inc. Allied Chemical Corp. Alpha Associates Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Betz Laboratories, Inc. Bio-Rad Laboratories Boehringer Mannheim Corp. Brinkmann Instruments, Inc. Calbiochem Chem Service, Inc. City Chemical Corp. Coleman Instruments Colorado Serum Co. Corco Chemical Corp. A. Daigger & Co. Delta Scientific Corp. Dexter Biological Co. E. I. du Pont de Nemours & Co., Inc. Durrum Instrument Corp. Eastern Chemical Carlo Erba S.p.A. Fermco Laboratories Fisher Scientific Co. Greiner Scientific Corp. Hach Chemical Co. Harleco Helena Laboratories Hellige, Inc. Hyland ICN Chemical & Radioisotope Div. Lachat Chemicals, Inc. LaMotte Chemical Products Co. LaPine Scientific Co. Lyne Labs, Inc. Mallinckrodt Chemical Works, Science Products Div. Maurukas Co., Inc. Medical Chemical Corp. Milton Roy Co. Nitine, Inc. Nuclear Medical Systems, Inc. Ohio Valley Specialty Chemical Co. Omega Chemical Corp. Perco Supplies Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Prolabo Quantum Industries Rankin Reagent Co. Regis Chemical Co. Reheis Chemical Co. Reliable Chemical Co. Resource Control, Inc. Scientific Products Sigma Chemical Co. Sircor Instruments Corp. G. Frederick Smith Chemical Co. Supelco, Inc. Technic, Inc. Technicon Instruments Corp. Unilab Research Corp. VAR-LAC-OID Chemical Co. VWR Scientific

solutions Ace Scientific Supply Co., Inc. Allied Chemical Corp. Alpha Associates Alpha Metals, Inc. Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Applied Science Labs., Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Betz Laboratories, Inc. Βίο-Med-Chem Co. Bio-Rad Laboratories Brinkmann Instruments, Inc. Central Scientific Co. Chem Service, Inc. City Chemical Corp. Coleman Instruments Colorado Serum Co. Corco Chemical Corp. Curtin Scientific Co. A. Daigger & Co. Delta Scientific Corp. Dexter Biological Co., Durrum Chemical Corp. Eastern Chemical EM Laboratories, Inc. Carlo Erba S.p.A. F & J Scientific Fermco Laboratories Fisher Scientific Co.

LABORATORY GUIDE

5

5

Prepared Standard Solutions, solutions Reagents, clinical

Greiner Scientific Corp. Hach Chemical Co. Harleco Hellige, Inc. Hyland ICN Chemical & Radioisotope Div. Lachat Chemicals, Inc. LaMotte Chemical Products Co. LaPine Scientific Co. The London Co. Lyne Labs, Inc. Mallinckrodt Chemical Works, Science Products Div. Materials Development Corp. Medical Chemical Corp. Nanogens National Spectrographs Laboratories, Inc. Nitine, Inc. Nuclear Medical Systems, Inc. Omega Chemical Corp. Orion Research Inc. Packard Instrument Co., Inc. Perco Supplies Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Power Applications, Inc. Prolabo Rankin Reagent Co. Regis Chemical Co. Reliable Chemical Co. Resource Control, Inc. Rhodia, Inc. Scientific Products Sigma Chemical Co. Sircor Instruments Corp. Spectrogram Corp. Spex Industries, Inc. Technic, Inc. Technicon Instruments Corp. Unilab Research Corp. Varian Aerograph VWR Scientific WATCON, Inc.

PROTEINS Alpine Geophysical Associates, Inc. Bodman Chemicals Cambridge Nuclear Corp. Cudahy Labs. A. Daigger & Co. Eastman Kodak Co., Eastman Organic Chemicals Freeman Industries, Inc. General Biochemicals Harleco ICN Chemical & Radioisotope Div. Industrial Biochemicals, Inc. LaPine Scientific Co. Miles Labs, Inc., Research Div. (III.) National Foam System National Instrument Laboratories, Inc, Nuclear Medical Systems, Inc. Nutritional Biochemicals Pfaltz& Bauer, Inc. Pharmacia Fine Chemicals, Inc. Phase Separations Ltd. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Reliable Chemical Co. SAS Scientific Chemicals, Ltd. Schwarz/Mann Sheffield Chemical Sigma Chemical Co. Unilab Research Corp. Worthington Biochemical Corp.

RADIOACTIVE CHEMICALS — see chemicals RARE EARTH METALS AND COMPOUNDS — see also metals, high purity Alusuisse Metals Inc. Amend Drug & Chemical Co., Inc. American Potash & Chemical Corp. Apache Chemicals, Inc. Aremco Products, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. The Bendix Corp., Scientific Instruments & Equipment Div. Bodman Chemicals Carpenter Technology Corp. Cerac, Inc. Chemicals Procurement Labs., Inc. City Chemical Corp. Columbia Organic Chemicals Co., Inc. A. Daigger & Co. Eagle-Picher Industries, Inc.

306 LG AUGUST 1972

Eastman Kodak Co., Eastman Organic Chemicals Electronic Space Products, Inc. Engineered Materials Fairmount Chemical Co., Inc. D. F. Goldsmith Chemical & Metal Corp. M. W. Hardy & Co., Inc. Hruden Laboratory Products Huxley Development Corp. ICN Chemical & Radioisotope Div. Imanco-Metals Research Jarrell-Ash Div. K & Κ Labs., Inc. Kawecki Berylco Industries, Inc. LaPine Scientific Co. Lunex Co. Materials Research Corp. MCB Manufacturing Chemists Michigan Chemical Corp. Ney Metals, Inc. Nuclear Elements Corp. Ozark-Mahoning Co. PCR, Inc. Pfaltz & Bauer, Inc. Pierce Chemical Co. Polysciences, Inc. Reliable Chemical Co. Research Chemicals Research Organic/Inorganic Chemical Corp. Rocky Mountain Research, Inc. Ronson Metals Corp. SAS Scientific Chemicals, Ltd. Spex Industries, Inc. Stohler Isotope Chemicals, Inc. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products Willow Brook Laboratories, Inc. Xtalonix Products

RARE GASES — s e e compressed gases REAGENTS general Achem Div. Aldrich Chemical Co., Inc. Allied Chemical Corp. Alpha Associates Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Atlantic Equipment Engineers J. T. Baker Chemical Co. Beckman Instruments, Inc. Brinkmann Instruments, Inc. Carbolabs, Inc. Central Scientific Co. Chem Service, Inc. Chemical Samples Co. City Chemical Corp. Colorado Serum Co. Columbia Organic Chemicals Co., Inc. Corco Chemical Corp. Cyclo Chemical A. Daigger & Co. Delta Scientific Corp. E. I. du Pont de Nemours & Co., Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo ErbaS.p.A. Fielding Chemical Co. Fisher Scientific Co. Frinton Labs. Galiard-Schlesinger Chemical Mfg. Corp. TheC. P. Hall Co. of Illinois Harleco Heico, Inc. James Hinton ICN Chemical & Radioisotope Div. Lachat Chemicals, Inc. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Materials Research Corp. MCB Manufacturing Chemists Merck Chemical Nuclear Medical Systems, Inc. Nutritional Biochemicals Omega Chemical Corp. PCR, Inc. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Prolabo Rankin Reagent Co. Reliable Chemical Co.

Rocky Mountain Research, Inc. Scientific Products Semi-Elements, Inc. Sigma Chemical Co. G. Frederick Smith Chemical Co. Arthur H. Thomas Co. Thompson Hayward Chemical Co. VAR-LAC-OID Chemical Co. VWR Scientific

amino acid Aldrich Chemical Co., Inc. Amend Drug & Chemical Co., Inc. Analabs, Inc. Apache Chemicals, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Bio-Cal Instrument Co. Bio-Rad Laboratories Brinkmann Instruments, Inc. Calbiochem Chem Service, Inc. City Chemical Corp. Cyclo Chemical E. I. du Pont de Nemours & Co., Inc. Durrum Chemical Corp. Durrum Instrument Corp. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories. Inc. Carlo Erba S.p.A. Fisher Scientific Co. Fox Chemical Co. Freeman Industries, Inc. Galiard-Schlesinger Chemical Mfg. Corp. General Biochemicals Hamilton Co. Hampshire Chemical Helena Laboratories Henley & Co., Inc. ICN Chemical & Radioisotope Div. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Merck Chemical Microbiological Associates, Inc. Miles Labs, Inc., Research Div. (III.) Miles Labs., Inc. Nuclear Medical Systems, Inc. Nutritional Biochemicals Packard Instrument Co., Inc. PCR, Inc. Pfaltz & Bauer, Inc. Pfanstiehl Labs, Inc. Phase Separations Ltd. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Prolabo Regis Chemical Co. Reliable Chemical Co. RHO Chemical Co. SAS Scientific Chemicals, Ltd. Schwarz/Mann Sigma Chemical Co. Supelco, Inc. Technicon Instruments Corp. Utopia Instrument Co.

analytical Achem Div. Aldrich Chemical Co., Inc. Allied Chemical Corp. Alpha Associates Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Applied Science Labs., Inc. Atlantic Equipment Engineers J. T. Baker Chemical Co. Barnebey-Cheney Co. Beckman Instruments, Inc. Betz Laboratories, Inc. Brinkmann Instruments, Inc. Central Scientific Co. Chemical Samples Co. City Chemical Corp. Corco Chemical Corp. Curtin Scientific Co. A. Daigger & Co. E. I. du Pont de Nemours & Co., Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A. F & J Scientific Fermco Laboratories Fielding Chemical Co. Fisher Scientific Co. Frinton Labs. Galiard-Schlesinger Chemical Mfg. Corp. General Biochemicals

Hach Chemical Co. Harleco James Hinton Hruden Laboratory Products ICN Chemical & Radioisotope Div. K & K Labs., Inc. Lachat Chemicals, Inc. LaMotte Chemical Products Co. LaPine Scientific Co. The London Co. Mallinckrodt Chemical Works, Science Products Div. M&T Chemicals Inc. Materials Research Corp. MCB Manufacturing Chemists Medical Chemical Corp. Merck Chemical Miles Labs, Inc., Research Div. (III.) Nanogens Ohio Valley Specialty Chemical Co. PCR, Inc. Perco Supplies Pfaltz & Bauer, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. PolyScience Corp. Polysciences, Inc. Princeton Organics, Inc. Prolabo Quantum Industries Rankin Reagent Co. Regis Chemical Co. Reliable Chemical Co. Rocky Mountain Research, Inc. SAS Scientific Chemicals, Ltd. Scientific Gas Products Inc. Scientific Products Semi-Elements, Inc. Sigma Chemical Co. G. Frederick Smith Chemical Co. Smith-Underwood Laboratories Southwestern Analytical Chemicals, Inc. Supelco, Inc. Technicon Instruments Corp. Varian Aerograph VAR-LAC-OID Chemical Co. VWR Scientific

calorimetric Allied Chemical Corp. J. T. Baker Chemical Co. Carlo ErbaS.p.A. Fisher Scientific Co. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Maurukas Co., Inc. Merck Chemical Omega Chemical Corp. Parr Instrument Co. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Princeton Organics, Inc. Prolabo Reliable Chemical Co. Scientific Gas Products Inc. Sigma Chemical Co. VWR Scientific

clinical Allied Chemical Corp. Amend Drug & Chemical Co., Inc. American Monitor Corp. Ames CQ. Anachemia Chemicals, Inc. Analabs, mc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Bio-Med-Chem Co. BioQuest Bio-Rad Laboratories Boehringer Mannheim Corp. Brinkmann Instruments, Inc. Calbiochem Canalco, Inc. City Chemical Corp. Clay Adams Colab Labs., Inc. Corco Chemical Corp. Corning Glass Works (Mass.) Curtin Scientific Co. A. Daigger & Co. Dexter Biological Co. Difco Laboratories Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo ErbaS.p.A. F & J Scientific

LABORATORY GUIDE

5

5

Reagents, clinical Reagents, water analysis

Fermco Laboratories Fisher Scientific Co. Flow Labs., Inc. Gallard-Schlesinger Chemical Mfg. Corp. Gam Rad, Inc. General Biochemicals Grand Island Biological Co. Hach Chemical Co. Harleco Hruden Laboratory Products Hyland ICN Chemical & Radioisotope Div. Isolab, Inc. Lakeway Chemicals, Inc. LaMotte Chemical Products Co. LaPine Scientific Co. The London Co. Mallinckrodt Chemical Works, Science Products Div. Maurukas Co., Inc. Medical Chemical Corp. The Medi-Chem Corp. Merck Chemical Miles Labs, Inc., Research Div. (III.) National Instrument Laboratories, Inc. Nuclear Medical Systems, Inc. Nutritional Biochemicals Omega Chemical Corp. Oxford Laboratories Pfaltz & Bauer, Inc. Pfanstiehl Labs, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. P-L Biochemicals, Inc. Plenum Scientific Research, Inc. Polysciences, Inc. Princeton BIOMEDIX Inc. Regis Chemical Co. Reliable Chemical Co. SAS Scientific Chemicals, Ltd. Schwarz/Mann Scientific Products SEARLE/BMI TheSelney Co:, Inc. Sigma Chemical Co. Sircor Instruments Corp. Technicon Instruments Corp. VWR Scientific Worthington Biochemical Corp.

diagnostic Alpha Associates American Monitor Corp. Anderson Laboratories, Inc. J. T. Baker Chemical Co. Bio-Rad Laboratories Colorado Serum Co. Corning Glass Works (Mass.) Difco Laboratories Dow Diagnostics Eastern Chemical EM Laboratories, Inc. Hach Chemical Co. Harleco Helena Laboratories Maurukas Co., Inc. Medical Chemical Corp. Nuclear Medical Systems, Inc. Pfaltz & Bauer, Inc. Pfanstiehl Labs, Inc. P-L Biochemicals, inc. Princeton BIOMEDIX Inc. Schwarz/Mann Supelco, Inc.

electronic grade Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Anderson Physics Labs., Inc. Apache Chemicals, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Brinkmann Instruments, Inc. City Chemical Corp. Corco Chemical Corp. E. t. du Pont de Nemours & Co., Inc. EM Laboratories, Inc. Carlo ErbaS.p.A. Fisher Scientific Co. Harleco Hruden Laboratory Products Lachat Chemicals, Inc. Mallinckrodt Chemical Works, Science Products Div. Materials Research Corp. Merck Chemical Nitine, Inc. Pfaltz & Bauer, Inc. Phy-Lab Polysciences, Inc. Precision Gas Products, inc. Princeton Organics, Inc. Prolabo

308 LG AUGUST 1972

Reliable Chemical Co. Rocky Mountain Research, Inc. Scientific Gas Products Inc. Semi-Elements, Inc. Thompson Hayward Chemical Co. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. VWR Scientific

enzymatic American Monitor Corp. Apache Chemicals, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Boehringer Mannheim Corp. The Borden Chemical Co. Brinkmann Instruments, Inc. Calbiochem Cudahy Labs. Cyclo Chemical EM Laboratories, Inc. Fermco Laboratories Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Gelman Instrument Co. General Biochemicals Gilford Instrument Labs., Inc. Harleco Helena Laboratories Henley & Co., Inc. Hruden Laboratory Products Hyland ICN Chemical & Radioisotope Div. Isolab, Inc. LaPine Scientific Co. Maurukas Co., Inc. Miles Labs, Inc., Research Div. (III.) Miles Labs., Inc. Nutritional Biochemicals Pfaltz & Bauer, Inc. Phase Separations Ltd. Phy-Lab Pierce Chemical Co. P-L Biochemicals, Inc. Polysciences, Inc. Princeton BIOMEDIX Inc. Regis Chemical Co. Reheis Chemical Co. Reliable Chemical Co. Schwarz/Mann SEARLE/BMI Sheffield Chemical Sigma Chemical Co. Technicon Instruments Corp. VWR Scientific Worthington Biochemical Corp.

histological Allied Chemical Corp. Alpha Associates Amend Drug & Chemical Co., Inc. Andor Chemical Corp. J. T. Baker Chemical Co. The Borden Chemical Co. Calbiochem City Chemical Corp. Corco Chemical Corp. Curtin Scientific Co. Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Fisher Scientific Co. Flow Labs., Inc. Gallard-Schlesinger Chemical Mfg. Corp. Gam-Rad, Inc. Harleco Hyland LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Medical Chemical Corp. Miles Labs, Inc., Research Div. (IK.) National Instrument Laboratories, Inc. Nutritional Biochemicals Omega Chemical Corp. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Reliable Chemical Co. Scientific Products Sigma Chemical Co. Sircor Instruments Corp. Technicon Instruments Corp. VWR Scientific

inorganic Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Anderson Laboratories, Inc. Andor Chemical Corp.

Apache Chemicals, Inc. Atlantic Equipment Engineers Atomergic Chemetals Co. J. T. Baker Chemical Co. Brinkmann Instruments, Inc. Chem Service, Inc. City Chemical Corp. Corco Chemical Corp. Curtin Scientific Co. A. Daigger & Co. Electronic Space Products, Inc. EM Laboratories, Inc. Carlo Erba S.p.A. Fielding Chemical Co. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Harleco Heico, Inc. Hruden Laboratory Products ICN Chemical & Radioisotope Div. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Merck Chemical Ozark-Mahoning Co. PCR, Inc. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phipps & Bird, Inc. Phy-Lab Polysciences, Inc. Prolabo Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. Rocky Mountain Research, Inc. Scientific Gas Products Inc. Semi-Elements, Inc. G. Frederick Smith Chemical Co. Smith-Underwood Laboratories Strem Chemicals, Inc. Technicon Instruments Corp. Thompson Hayward Chemical Co. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products VWR Scientific Wood Ridge Chemical Corp.

mercury analysis J. T. Baker Chemical Co. Barnebey-Cheney Co. Coleman Instruments A. Daigger & Co. Eastern Chemical F & J Scientific Fielding Chemical Co. Hach Chemical Co. Harleco Hruden Laboratory Products Koslow Scientific Co. Pfaltz & Bauer, Inc.

microscopy Allied Chemical Corp. J. T. Baker Chemical Co. The Borden Chemical Co. Brinkmann Instruments, Inc. R. P. Cargille Labs., Inc. Eastern Chemical EM Laboratories, Inc. Carlo Erba S.p.A. Fisher Scientific Co. Harleco ICN Chemical & Radioisotope Div. MCB Manufacturing Chemists Medical Chemical Corp. Merck Chemical Miles Labs, Inc., Research Div. (III.) PCR, inc. Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Polysciences, Inc. Reliable Chemical Co. Sircor Instruments Corp. Structure Probe, Inc. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products VWR Scientific

moisture determining Ace Scientific Supply Co., Inc. Allied Chemical Corp. Anachemia Chemicals, Inc. Andor Chemical Corp. J. T. Baker Chemical Co. Beckman Instruments, Inc. R. P. Cargille Labs., Inc. Corco Chemical Corp. Harry W. DietertCo. Eastman Kodak Co., Eastman Organic Chemicals

EM Laboratories, Inc. Carlo ErbaS.p.A. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Harleco LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Merck Chemical Pfaltz & Bauer, Inc. Phipps & Bird, Inc. Phy-Lab Reliable Chemical Co. Scientific Gas Products Inc. Scientific Products G. Frederick Smith Chemical Co. Arthur H. Thomas Co. VWR Scientific

organic metal Achem Div. Aldrich Chemical Co., Inc. Allied Chemical Corp. Anderson Development Co. Andor Chemical Corp. Apache Chemicals, Inc. J. T. Baker Chemical Co. City Chemical Corp. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo Erba S.p.A. Fairmount Chemical Co., Inc. F & J Scientific Fisher Scientific Co. Frinton Labs. ICN Chemical & Radioisotope Div. K& Κ Labs., Inc. Kings Laboratories LaMont Laboratories LaMotte Chemical Products Co. LaPine Scientific Co. Lithium Corp. of America Mallinckrodt Chemical Works, Science Products Div. MCB Manufacturing Chemists Ohio Valley Specialty Chemical Co. Orgmet, Inc. PCR, Inc. Pfaltz & Bauer, Inc. Phy-Lab Polysciences, Inc. Prolabo Reliable Chemical Co. Research Organic/Inorganic Chemical Corp. Scientific Gas Products Inc. Strem Chemicals, Inc. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products VWR Scientific Wood Ridge Chemical Corp.

water analysis Ace Scientific Supply Co., Inc. Achem Div. Allied Chemical Corp. Alpha Associates Anachemia Chemicals, Inc. Analabs, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, inc. J. T. Baker Chemical Co. Betz Laboratories, Inc. Central Scientific Co. City Chemical Corp. Corco Chemical Corp. Corning Glass Works (Mass.) Curtin Scientific Co. A. Daigger & Co. Delta Scientific Corp. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Carlo Erba S.p.A. Fielding Chemical Co. Fisher Scientific Co. Hach Chemical Co. Harleco Hellige, Inc. Interex Corp. lonac Chemical Co. Koslow Scientific Co. LaMont Laboratories LaMotte Chemical Products Co. LaPine Scientific Co. Mallinckrodt Chemical Works, Science Products Div. Medical Chemical Corp. Milton Roy Co. Omega Chemical Corp. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phipps & Bird, Inc.

LABORATORY GUIDE

5

Reagents, water analysis Sources, radiochemical

Phy-Lab Pierce Chemical Co. Precision Gas Products, Inc. Prolabo Rankin Reagent Co. Reliable Chemical Co. Scientific Products G. Frederick Smith Chemical Co. Technicon Instruments Corp. Vulcan Laboratories, Inc. VWR Scientific WATCON, Inc.

REAGENTS FOR MICROCOMBUSTION AND MICROANALYSIS microanalysis

5

Allied Chemical Corp. J. T. Baker Chemical Co. Brinkmann instruments, Inc. Chem Service, Inc. Cudahy Labs. A. Daigger & Co. Carlo ErbaS.p.A. Fermco Laboratories Flow Labs., Inc. Greiner Scientific Corp. Harleco James Hinton Hruden Laboratory Products Hyland LaPine Scientific Co. Phase Separations Ltd. Phy-Lab Princeton Organics, Inc. Reliable Chemical Co. Technicon Instruments Corp. Arthur H. Thomas Co.

microcombustion Allied Chemical Corp. J. T. Baker Chemical Co. Carlo ErbaS.p.A. Greiner Scientific Corp. James Hinton LaPine Scientific Co. Lithium Corp. of America Phy-Lab Princeton Organics, Inc. Prolabo Arthur H. Thomas Co.

REAGENTS FOR QUALITATIVE ANALYSIS general test papers Amend Drug & Chemical Co., Inc. American Gas & Chemicals, Inc.

Ames Co.

Anachemia Chemicals, Inc. J. T. Baker Chemical Co. City Chemical Corp. A. Daigger & Co. Carlo ErbaS.p.A. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Greiner Scientific Corp. Harleco Koslow Scientific Co. LaMotte Chemical Products Co. LaPine Scientific Co. Phipps & Bird, Inc. Phy-Lab Prolabo VWR Scientific

spot test Ace Scientific Supply Co., Inc. Aldrich Chemical Co., Inc. J. T. Baker Chemical Co. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals Fielding Chemical Co. Gallard-Schlesinger Chemical Mfg. Corp. Greiner Scientific Corp. Koslow Scientific Co. LaMotte Chemical Products Co. LaPine Scientific Co. Phy-Lab Springmatic Co. VWR Scientific

310 LG AUGUST 1972

REAGENTS FOR QUANTITATIVE ANALYSIS Achem Div. Aldrich Chemical Co., Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Anderson Laboratories, Inc. Andor Chemical Corp. Apache Chemicals, Inc. Atomergic Chemetals Co. J. T. Baker Chemical Co. Burdick & Jackson Labs., Inc. A. Daigger & Co. E. I. du Pont de Nemours & Co., Inc. Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo ErbaS.p.A. Hach Chemical Co. Harleco James Hinton Hruden Laboratory Products Lachat Chemicals, Inc. LaMont Laboratories LaPine Scientific Co. MCB Manufacturing Chemists Medical Chemical Corp. Phase Separations Ltd. Phy-Lab Pierce Chemical Co. Rankin Reagent Co. Reliable Chemical Co. Research Appliance Co. G. Frederick Smith Chemical Co. Smith-Underwood Laboratories Springmatic Co. Supelco, Inc. Technicon Instruments Corp. VAR-LAC-OID Chemical Co.

REFRACTORY METALS — see metals, refractory RESINS Allied Chemical Corp. Applied Plastics Co., Inc. J. T. Baker Chemical Co. The Borden Chemical Co. Cellomer Associates, Inc. Dow Corning Corp. E. I. du Pont de Nemours & Co., Inc. B. F. Goodrich Chemical Co. Harleco Hughes Aircraft Co. 1CN Chemical & Radioisotope Div. lonac Chemical Co. KenicsCorp. LaPine Scientific Co. Lithium Corp. of America Pennsylvania Industrial Chemical Corp. Polysciences, Inc. Ram Chemicals Reliable Chemical Co. Schwarz/Mann TennecoChemicals, Inc. Union Carbide Corp., Chemicals & Plastics VWR Scientific Waters Associates Inc.

ICN Chemical & Radioisotope Div. Instrumentation Laboratory Inc. Kent Instrument Corp. LaMotte Chemical Products Co. Leeds & Northrup Co. The London Co. Lyne Labs, Inc. Mallinckrodt Chemical Works, Science Products Div. Matheson Scientific MCB Manufacturing Chemists Nuclear Medical Systems, Inc. Omega Chemical Corp. Phipps & Bird, Inc. Photovolt Corp. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Rankin Reagent Co. Sigma Chemical Co. Sircor Instruments Corp. Arthur H. Thomas Co. VWR Scientific

Merck Chemical Nitine, Inc. Packard Instrument Co., Inc. PfaltzA Bauer, Inc. Phy-Lab Pierce Chemical Co. Pollard & Co. Polysciences, Inc. Prolabo Regis Chemical Co. Reliable Chemical Co. RHO Chemical Co. SAS Scientific Chemicals, Ltd. Sunshine Chemical Corp. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics Utopia Instrument Co. VWR Scientific Wilmad Glass Co., Inc.

SOLVENTS

Allied Chemical Corp. Anachemia Chemicals, Inc. Analabs, Inc. Apache Chemicals, Inc. J. T. Baker Chemical Co. BDH Chemicals Bodman Chemicals Burdick & Jackson Labs., Inc. City Chemical Corp. Eastman Kodak Co., Eastman Organic Chemicals James Hinton ICN Chemical & Radioisotope Div. Isolab, Inc. LaPine Scientific Co. MCB Manufacturing Chemists Merck Chemical PfaltzS Bauer, Inc. Phillips Petroleum Co. Phipps & Bird, Inc. Phy-Lab Prolabo Reliable Chemical Co. VAR-LAC-OID Chemical Co. VWR Scientific

deuterium Aldrich Chemical Co., Inc. J. T. Baker Chemical Co. Bio-Rad Laboratories Cellomer Associates, Inc. Chemical Samples Co. City Chemical Corp. Columbia Organic Chemicals Co., Inc. Diaprep, Inc. EM Laboratories, Inc. ICN Chemical & Radioisotope Div. Isomet Corp. Mallinckrodt/Nuclear Marshallton Research Labs., Inc. MCB Manufacturing Chemists Merck Sharp & Dohme Canada Ltd. Merck Chemical Miles Labs, Inc., Research Div. (III.) Miles Labs., Inc. Nuclear Equipment Chemical Corp. Omega Chemical Corp. Phase Separations Ltd. SAS Scientific Chemicals, Ltd. Schwarz/Mann Wilmad Glass Co., Inc.

extraction Aldrich Chemical Co., Inc. Allied Chemical Corp. Anachemia Chemicals, Inc. J. T. Baker Chemical Co. BDH Chemicals City Chemical Corp. Carlo ErbaS.p.A. FMC Corp., Organic & Inorganic Chemicals Div. Harleco LaPine Scientific Co. MCB Manufacturing Chemists Merck Chemical Nitine, Inc. Phillips Petroleum Co. Phy-Lab Pittsburgh Activated Carbon Div. Thompson Hayward Chemical Co. Union Carbide Corp., Chemicals & Plastics VWR Scientific

SCINTILLATION high purity CHEMICALS — s e e Aldrich Chemical Co., Inc. chemicals Allied Chemical Corp. SERVICES — see CUSTOM & Amend Drug & Chemical Co., Anachemia Chemicals, Inc. RESEARCH SERVICES, Analabs, Inc. Analtech, Inc. Section 7 SOLUTIONS, pH buffer Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Andor Chemical Corp. J. T. Baker Chemical Co. Beckman Instruments, Inc. City Chemical Corp. Coleman Instruments Corco Chemical Corp. Corning Glass Works (N.Y.) Corning Glass Works (Mass.) Curtin Scientific Co. Difco Laboratories EM Laboratories, Inc. Carlo Erba S.p.A. Hach Chemical Co. Harleco Hellige, Inc.

Inc.

Andor Chemical Corp. Apache Chemicals, Inc. J. T. Baker Chemical Co. Bodman Chemicals Burdick & Jackson Labs., Inc. Chem Service, Inc. Chemical & Solvent Distillers Co., Inc. City Chemical Corp. Corco Chemical Corp. Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo ErbaS.p.A. Fisher Scientific Co. Harleco James'Hinton ICN Chemical & Radioisotope Div. Isolab, Inc. Lachat Chemicals, Inc. LaPine Scientific Co. MCB Manufacturing Chemists

spectrochemical

spectrophotometric Aldrich Chemical Co., Inc. Allied Chemical Corp. Anachemia Chemicals, Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Bodman Chemicals Burdick & Jackson Labs., Inc. Chem Service, Inc. City Chemical Corp. Corco Chemical Corp. Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Carlo ErbaS.p.A. James Hinton Lachat Chemicals, Inc. LaPine Scientific Co. MCB Manufacturing Chemists Merck Chemical Nitine, Inc. PfaltzA Bauer, Inc. Phillips Petroleum Co. Phipps & Bird, Inc. Phy-Lab Pierce Chemical Co. Pollard & Co. Prolabo Reliable Chemical Co. Sigma Chemical Co. G. Frederick Smith Chemical Co. VWR Scientific

SOURCES, Mossbauer effect Amersham/Searle Corp. G. F. Bush Associates ICN Chemical & Radioisotope Div. New England Nuclear U. S. Nuclear Corp.

SOURCES, radiochemical Aerotest Operations American Nuclear Corp. Amersham/Searle Corp. Atomic Corp. of America Beckman.Instruments, Inc. Cambridge Nuclear Corp. Eberline Instrument Corp. General Electric Co. General Electric Co., Irradiation Processing Operation ICN Chemical & Radioisotope Div. Interex Corp.

LABORATORY GUIDE

5

Sources, radiochemical Standards, water analysis

LaPine Scientific Co. National Spectrographic Laboratories, Inc. New England Nuclear Nuclear Equipment Chemical Corp. Packard Instrument Co., Inc. Radiation Materials Co., Inc. Teledyne Isotopes (Calif.)

SPECTROSCOPIC POWDERS — see spectroscopic

Applied Science Labs., Inc. Harleco Regis Chemical Co.

flame photometer Advanced Instruments, Inc.

powders, Allied Chemical Corp.

SPIN LABELS Aldrich Chemical Co., Inc. PCR, Inc.

STAINS, biological

5

drug

Aldrich Chemical Co., Inc. Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. J. T. Baker Chemical Co. The Borden Chemical Co. CCM: Schaar Scientific, Inc. Chem Service, Inc. City Chemical Corp. Colab Labs., Inc. Colorado Serum Co. Difco Laboratories Eastern Chemical Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. Fielding Chemical Co. Fisher Scientific Co. Gallard-Schlesinger Chemical Mfg. Corp. Gam Rad, Inc. Hach Chemical Co. Harleco LaPine Scientific Co. MCB Manufacturing Chemists Medical Chemical Corp. MilliporeCorp. Pfaltz & Bauer, Inc. Phase Separations Ltd. Phy-Lab Pierce Chemical Co. Polysciences, Inc. Reliable Chemical Co. SAS Scientific Chemicals, Ltd. Schwarz/Mann Scientific Products Sigma Chemical Co. Sircor Instruments Corp. Technicon Instruments Corp. VWR Scientific Winthrop Laboratories

Anachemia Chemicals, Inc. ArRo Labs., Inc. J. T. Baker Chemical Co. Beckman Instruments, Inc. Canalco, Inc. Coleman Instruments Corning Glass Works (Mass.) EM Laboratories, Inc. F & J Scientific Fisher Scientific Co. Harleco Instrumentation Laboratory Inc. LaPine Scientific Co. The London Co. Medical Chemical Corp. Merck Chemical National Instrument Laboratories, Inc. National Spectrographic Laboratories, Inc. Omega Chemical Corp. Phipps & Bird, Inc. Phy-Lab Rankin Reagent Co. Reliable Chemical Co. Scientific Products Sircor Instruments Corp. Stewart Laboratories, Inc. Technicon Instruments Corp. Utopia Instrument Co. VWR Scientific

food chemical Reliable Chemical Co.

herbicide Chem Service, Inc. City Chemical Corp. Pfaltz & Bauer, Inc. PolyScience Corp.

hormone Nutritional Biochemicals Pfaltz & Bauer, Inc. Reliable Chemical Co.

hydrocarbon STANDARDS antoxidant Chem Service, Inc.

atomic absorption Ace Scientific Supply Co., Inc. Allied Chemical Corp. Alpha Metals, Inc. Apache Chemicals, Inc. ArRo Labs., Inc. J. T. Baker Chemical Co. BDH Chemicals Beckman Instruments, Inc. Cannon Instrument Co. Corning Glass Works (Mass.) Eastman Kodak Co., Eastman Organic Chemicals EM Laboratories, Inc. F & J Scientific Harleco Instrumentation Laboratory Inc. Jarrell-Ash Div. National Spectrographic Laboratories, Inc. Reliable Chemical Co. Spectrogram Corp. Spex Industries, Inc. Ventron Corp., Alfa Products

calibration - see calibration standards dielectric specimens Reliable Chemical Co.

312 LG AUGUST 1972

Chem Service, Inc. Farchan Research Labs. Lachat Chemicals, Inc. MCB Manufacturing Chemists Nuclear Medical Systems, Inc. Packard Instrument Co., Inc. Pfaltz & Bauer, Inc. PolyScience Corp. Reliable Chemical Co. Scientific Gas Products Inc.

insecticide Analabs, Inc. Applied Science Labs., Inc. Beckman Instruments, Inc. Chem Service, Inc. City Chemical Corp. Dead Sea Works Corp. E. I. du Pont de Nemours & Co., Inc. Nanogens Perco Supplies Phase Separations Ltd. PolyScience Corp. Regis Chemical Co. Supelco, Inc. Varian Aerograph

leak detector Alltech Associates, Inc. American Gas & Chemicals, Inc. DEVCO Engineering, Inc. E. I. du Pont de Nemours & Co., Inc. ICN Chemical & Radioisotope Div. LaPine Scientific Co. Monsanto Co. Nitine, Inc. NUPROCo. Ohio Medical Products

Research Appliance Co. Royco Instruments, Inc. Tescom Corp. Vactronic Lab. Equipment, Inc. Varian Vacuum Div.

mercury analysis J. T. Baker Chemical Co. Coleman Instruments Corning Glass Works (Mass.) F & J Scientific Harleco

Koslow Scientific Co.

molecular weight, hydrogenated polybutadiene polymers Lithium Corp. of America

molecular weight, polybutadiene polymers Lithium Corp. of America Polysciences, Inc. Pressure Chemical Co. SAS Scientific Chemicals, Ltd.

Mossbauer effect Amersham/Searle Corp. Austin Science Associates, Inc. ICN Chemical & Radioisotope Div. New England Nuclear U. S. Nuclear Corp.

pesticide Analabs, Inc. Applied Science Labs., Inc. Beckman Instruments, Inc. Chem Service, Inc. City Chemical Corp. Dead Sea Works Corp. E. I. du Pont de Nemours & Co., Inc. Fisher Scientific Co. LaPine Scientific Co. Nanogens Packard Instrument Co., Inc. Perco Supplies Phase Separations Ltd. Phipps* Bird, Inc. PolyScience Corp. Regis Chemical Co. Supelco, Inc. Varian Aerograph

PH Allied Chemical Corp. Amend Drug & Chemical Co., Inc. Anachemia Chemicals, Inc. Andor Chemical Corp. J. T, Baker Chemical Co. Beckman Instruments, Inc. Coleman Instruments Corning Glass Works (N.Y.) Corning Glass Works (Mass.) Delta Scientific Corp. Eastman Kodak Co., Eastman Organic Chemicals Fisher Scientific Co. General Biochemicals Greiner Scientific Corp. Hach Chemical Co. Harleco Hellige, Inc. Instrumentation Laboratory Inc. Kent Instrument Corp. LaMotte Chemical Products Co. LaPine Scientific Co. The London Co. MCB Manufacturing Chemists Medical Chemical Corp. Oméga Chemical Corp. Phipps & Bird, Inc. Photovolt Corp. Phy-Lab Regis Chemical Co. Scientific Products Sircor Instruments Corp. Smith-Underwood Laboratories Arthur H. Thomas Co. VWR Scientific

primary reagent Allied Chemical Corp. Amend Drug & Chemical Co., Inc.

Anachemia Chemicals, Inc. Analabs, Inc. Andor Chemical Corp. J. T. Baker Chemical Co. BDH Chemicals City Chemical Corp. E. I. du Pont de Nemours & Co., Inc. Fermco Laboratories Fisher Scientific Co. Hach Chemical Co. James Hinton Lachat Chemicals, Inc. LaMotte Chemical Products Co. LaPine Scientific Co. Materials Research Corp. Phase Separations Ltd. Phipps & Bird, Inc. Princeton Organics, Inc. Reliable Chemical Co. SAS Scientific Chemicals, Ltd. Scientific Products Sigma Chemical Co. G. Frederick Smith Chemical Co. Smith-Underwood Laboratories VWR Scientific

radiochemical Amersham/Searle Corp. Applied Science Labs., Inc. Beckman Instruments, Inc. Eberline Instrument Corp. General Electric Co. ICN Chemical & Radioisotope Div. InterexCorp. , Intertechnique Instruments, Inc. Isolab, Inc. LaPine Scientific Co. Mallinckrodt/Nuclear New England Nuclear Nuclear Equipment Chemical Corp. Nuclear Medical Systems, Inc. Packard Instrument Co., Inc. Schwarz/Mann Spectrum Medical Industries, Inc. U. S. Nuclear Corp.

spectrochemical Allied Chemical Corp. Alpha Metals, Inc. Anachemia Chemicals, Inc. Angstrom, Inc. Atlantic Equipment Engineers J. T. Baker Chemical Co.

City Chemical Corp.

Coleman Instruments F & J Scientific Fisher Scientific Co. James Hinton Instrumentation Laboratory Inc. Jarrell-Ash Div. Morris P. Kirk & Son, Inc. LaPine Scientific Co. Materials Research Corp. Merck Chemical National Spectrographic Laboratories, Inc. PCR, Inc. Phillips Petroleum Co. Phipps & Bird, Inc. Reliable Chemical Co. Somar Labs., Inc. Spex Industries, Inc. Stewart Laboratories, Inc. Technicon Instruments Corp. United Mineral & Chemical Corp. VAR-LAC-OID Chemical Co. Ventron Corp., Alfa Products VWR Scientific

steroids Analabs, Inc. Applied Science Labs., Inc. Chem Service, inc. Packard Instrument Co., Inc. Pfaltz & Bauer, Inc. Pierce Chemical Co. Reliable Chemical Co. Schwarz/Mann

unsaturation distribution, polybutadiene polymers Lithium Corp. of America

water analysis Allied Chemical Corp. Alpha Metals, Inc. Analabs, Inc. Andor Chemical Corp.

LABORATORY GUIDE

5

Standards, water analysis Temperature Indicating Markers

J. T. Baker Chemical Co. Beckman Instruments, Inc. Corning Glass Works (Mass.) Cudahy Labs. Delta Scientific Corp. Fisher Scientific Co. Hach Chemical Co. Harleco Hellige, Inc. Kent Instrument Corp. LaMotte Chemical Products Co. LaPine Scientific Co. Millipore Corp. Milton Roy Co. Nuclear Medical Systems, Inc. Omega Chemical Corp. Phase Separations Ltd. PhippsS Bird, Inc.

Phy-Lab Precision Gas Products, Inc. Rankin Reagent Co. Royco Instruments, Inc. Scientific Products Technicon Instruments Corp. Vutcan Laboratories, Inc. VWR Scientific WATCON, Inc.

STATIONARY LIQUID PHASES Alltech Associates, Inc. Analabs, Inc. Applied Science Labs:, Inc.

J. T. Baker Chemical Co. DOHRMANN Div. Envirotech Corp. Eastman Kodak Co., Eastman Organic Chemicals Carlo ErbaS.p.A. Lachat Chemicals, Inc. LaPine Scientific Co. Nuclear-Chicago Ohio Valley Specialty Chemical Co. PCR, Inc. Perkin-Eimer, Ltd. Phase Separations Ltd. Pierce Chemical Co. PolyScience Corp. Precision Sampling Corp. Regis Chemical Co. The Separations Group Supelco, Inc.

Varian Aerograph Waters Associates Inc.

TEMPERATURE INDICATING MARKERS Allied Chemical Corp. W. H. Brady Co. Carlo Erba S.p.A. NanMac Corp. Phipps & Bird, Inc. Pressure Chemical Co. United Mineral & Chemical Corp.

ULTRAVIOLET CHEMICALS — see chemicals

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314 LG AUGUST 1972

LABORATORY GUIDE