IN THE LABORATORY Du Pont Reagents must pass rigid tests for strength and purity. Here, a technician makes a sulfate determination. Standards are high — arsenic content, for example, must not exceed 1 part per hundred million.
ON THE FILLING LINE an operator rechecks for purity, even though Du Pont Reagents are carefully filtered and their hottles thoroughly washed. Foreign malter or the slightest off color is immediate cause for rejection.
Du Pont Reagents are checked 113 times during manufacture to assure highest purity More than 113 tests during manufacture, packaging and storing assure t h e consistent high purity of Du P o n t Reagents. You can c o u n t on their quality—each must equal or surpass American Chemical Society and electronic-grade requirements as well as those of the U . S . Pharmacopoeia and U . S . Food and Drug Administration when they apply. In addition, you get the advantages of single-trip cartons, safety grips on 5-pint bottles, dripless sleeves and color coding-of caps and labels. Get full details about dependable Du Pont Reagents and the name of your nearest distributor by writing Du P o n t , Industrial and Biochemicals Department, Room 2533-AC N e m o u r s Building, Wilmington 98. Delaware.
DU PONT REAGENTS AMMONIUM HYDROXIDE · HYDROCHLORIC ACID NITRIC ACID · SULFURIC ACID ACETIC ACID GLACIAL
DU PONT " t u . U.S. PAT. OFF".
BETTER T H I N G S FOR BETTER U V I N G . . THROUGH
CHEMISTRY
Circle No. 41 on Readers' Service Card
VOL. 32, NO. 4, APRIL 1960
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87 A
