THE LEGENDARY FIREBIRD, the Phoenix, rose young and strong again a n d again from flames . . . This is the Norton Firebird . . . symbol of the exciting new fused materials made in Norton's electric furnaces.
SAFETY Shock-Sensitive Peroxides O b s e r v e t e m p e r a t u r e limits a n d use a solvent to a v o i d acetylenic p e r o x i d e fires
Helpful booklet on
NITRIDES and other electro-chemicals
W HKN preparing acetylenic perox ides, strict temperature controls may mean t h e difference between a success ful synthesis and an explosion, accord ing to Dr. Nicholas A. Milas of Massa chusetts Institute of Technology and Dr. Orvilîe L. Mageli of Wallace & Tiernan's Lucidol division. Since interest in these peroxides has sharpened, several chemists have re ported fires that started while they were using t h e Milas-Mageli acetylenic peroxide synthesis, reported in JACS, 75, 1472 ( 1 9 5 2 ) . T h e authors, there fore, wish to emphasize the importance of temperature in the reaction.
Acetylenic peroxides are relatively stable at room temperature, they ex plain, b u t this stability should not bo contused with shock sensitivity. Sonic of the dihydroperoxides are shock sen sitive in the pure state, t h e authors warn, a n d n e e d to b e handled with ex treme care. During the peroxide synthesis, Dr. Milas a n d Dr. Mageli say, the reaction mixture thickens, a n d efficient stirring a n d cooling a r e necessary to maintain the t e m p e r a t u r e within 5 ° C. If lo calized heating occurs, acid-initiated decomposition may lead to spontaneous ignition. But temperature control can b e simplified, they a d d , if an inert sol vent or other xmreactive material is used to dilute the product. They describe such an inert solvent system in their m e t h o d of preparing 3,8-dimethyl-4,6deeacliyn-3,8-dihydroperoxide in JACS, 7 5 , 5 9 7 0 (1953)'. ■
Like the fabled Phoenix, Norton NITRIDES acquire their wonder-working capabilities in intense heat. In electric furnaces they are chemically formed and physically "tempered" to the require ments of modern industry. Here versatile BORON NITRIDE attains the properties of a heat-resistant lubri cant, an anti-sticking agent, a high volt age and temperature dielectric and .an excellent thermal insulator. TITANIUM NITRIDE develops characteristics ideally suited to the requirements of special crucibles, components and cermets, par ticularly resistant to attack by molten media at elevated temperatures. Norton NITRIDES have many different applications. Get facts that may benefit your own processing problems. Write for booklet.
NORTON
COMPANY,
Electro-
Chemical Division, 868 New Bond Street, Worcester 6, Massachusetts.
ELECTRO-CHEMSCALS GIFTS OF THE FIREBIRD: compounds of silicon zirconium · boron · aluminum · magnesium titanium · chromium . . . including many borides carbides · nitrides · oxides
MAKING BETTER PRODUCTS ...TO M A K E YOUR PRODUCTS BETTER 66
C&EN
SEPT.
14, 1 9 5 9
φ Plastic Panels Survive Blast W h e n an explosion rocked Hooker Chemical's Niagara Falls, Ν . Υ., plant, this building, close to the blast, lost only a few glass w i n d o w panes. Its Hetron polyester resin panels either flexed and sprang back in place or were forced loose from their bolts and dropped to the ground intact. T h e explosion leveled the concrete block, organic chemicals building w h e r e it occurred, Hooker says. Most nearby buildings were damaged, a n d personnel i n the area were endangered by flying glass, concrete, and other debris, according to the company.
Bsrieis * * * ^ The Chemical Specialties Manufac turers Association recommends this wording for ethylene glycol base anti freeze labels: W A R N I N G : HARM F U L OR F A T A L I F S W A L L O W E D . Do not drink antifreeze or solution. If .swallowed, induct 1 vomiting immedi ately. Call a physician. Ethylene glycol base. Do not store in open or unlabeled containers. K E E P O U T O F REACH O F CHILDREN. ► Safe handling techniques for indus trial users of vinyl acetate are described in a new chemical safety data sheet published b y the Manufacturing Chem ists' Association, 1825 Connecticut Ave., Washington 9, D. C. T h e book let, SD-75, covers physical properties, hazards, engineering control, employee safety, fire fighting, labeling, transporta tion, handling, storage, and first-aid for vinyl acetate. ► " S h o w m a n s h i p in S a f e t y " can inject
fun, color, and s h o w m a n s h i p into in dustrial safety programs, says its pub lisher, the National Safety Council, Chicago 1 1 , 111. T h e 96-page booklet gives ideas for safety stunts, demon strations, a n d promotions. k "LP-Gas Fire C o n t r o l / ' a 10-minute, 16-mm., color a n d sound film, is an onthe-scene report of fighting a liquefied petroleum gas tank truck fire. National Fire Protection Association produced the film for use b y fire training schools, fire departments, and t h e gas industry.
anaivze per billion
m parts
— w i t h a P - E Model 21 o r 2 2 1 I n f r a red S p e c t r o p h o t o m e t e r equipped w i t h a L o n g P a t h Cell a c c e s s o r y , as s h o w n h e r e . Cell p r o v i d e s a c t u a l p a t h l e n g t h s u p to 40 m e t e r s . W i t h scale e x p a n s i o n f e a t u r e of t h e s e i n s t r u m e n t s , p a t h l e n g t h c a n be e x t e n d e d t o t h e e q u i v a l e n t of 800 m e t e r s . U s e ful f o r a i r p o l u t i o n s t u d i e s , q u a n t i
t a t i v e a n a l y s i s of C H m i x t u r e s , natural gas purity determinations, free radical investigations a n d kine tic studies. F o r full i n f o r m a t i o n on t h i s a n d o t h e r Model 21 & 221 a c c e s s o r i e s , write Perkin-Eimer Corporation, 7 5 0 D a n b u r y Road, N o r w a l k , Conn.
INSTRUMENT
DIVISION
P e r k i n - E l m e r Ctymatu»^ NORWALK,
CONNECTICUT
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Literature. · .
PROPERTIES AND
► Artisan Metal Products, W a l t h a m , Mass., has p r e p a r e d a bulletin outlin ing recommendations that may elimi nate indiscriminate use of sight glasses. T h e c o m p a n y says present pressure vessel regulations do not govern the use and m a i n t e n a n c e of sight glasses, although these elements m a y b e weak links in t h e strength of vessels. S1
SPÉCIFICATIONS
► A n e w w o r k i n g guide to safe han dling and use of flammable, liquids in production and m a i n t e n a n c e operations describes m e t h o d s and e q u i p m e n t re quired for safe control. Protectoseal Co., Chicago 8, 111. S2
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Further useful information on keyed Safety items menH o n e d is r e a d i l y a v a i l a b l e . . .
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