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CHEMICALS
r Crops Get Smog Protection Water-soluble Ozoban from Pfizer enters p l a n t cells,gives smog resistance
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ORGANIC INTERMEDIATES Know ye t h a t these eleven D I A M O N D chlorinated prod ucts are twice a s many as were available to you before . . . t h a t they are readily available . . . that they can be shipped promptly to your plant. BENZENESULFONYL CHLORIDE
P-CHLOROBENZENESULFONAMiDE PARACHLOROBENZENESULFONYL CHLORIDE
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CHLOROBENZENE
C H L O R A L £ , 4, « T R I ( H L O R O P I I K \ ( » L 50% P O T A S S I U M SAL.T O F 2, 4, 6 - T R I C H L O R O P H E N O L HEXACHLOROBUTAD
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Know ye, also, that Diamond can chlorinate and hydrochlorinate t o suit your product n e e d s , w h a t e v e r t h e y be.
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Diamond Chemicals
O M O G - I X F L I C T E D crop losses totaling millions of dollars a y e a r may b e r e d u c e d by a n e w plant spray from Pfizer. C a l l e d O z o b a n , t h e p r o d u c t is a w a t e r soluble ascorbic acid formulation w h i c h , w h e n sprayed o n plants, e n t e r s t h e cells and enables vegetation t o re sist t h e toxic effects of ozone a n d o t h e r o x i d i z e d hydrocarbons. A light a p p l i c a t i o n in a d v a n c e o f and during a s m o g attack p r e v e n t s the b u r n i n g and b r o n z ing o f l e a v e s usually caused b y s m o g , Pfizer says. T h e product has s o m e drawbacks, however. B i g limitations are cost o f t h e c h e m i c a l -and t h e adequacy of s m o g p r e d i c t i o n s , say Southern California re s e a r c h e r s . S i n c e O z o b a n is used u p b y s m o g , l o n g p e r i o d s of s m o g will require r e p e a t e d spraying.-». A n d the p r o d u c t is effective, a d d t h e r« searchers, only a s l o n g as t h e titer of ascorbic acid i n t h e cell stays a b o v e a certain level. O z o h a n w a s tested b y H. T . F r e e hairn a n d J. D a v i d s o n at the U n i v e r s i t y o f California's agricultural e x p e r i m e n t station a t Riverside, Calif. A mixture o f 2 lb. O z o b a n i n 1 0 0 gal. of w a t e r w a s s p r a y e d on pinto beans, romaine l e t t u c e , celery, a n d ornamental flowers five t i m e s a week for a s long as five» w e e k s with no d a m a g i n g effect. A n d at this concentration, the chemical g a v e p r o t e c t i o n against s m o g , Pfizer a d d s . After a use-level h a s been e s t a b l i s h e d , O z o b a n m a y b e applied r e g u .larly t w o or three times a week d u r i n g the s m o g season, or 12 t o 24 h r . b e f o r e e a c h s m o g attac
