Document 6R5xxYgL7Jba2Gv4vgzjYbw8m

* ' " ' 'l.. ' '! it i-' - * -*. boo: W. S. Clark F. 0. Sutton * Wilmington John Van Colder - Wilmington ?r % April 19, 1971 Mr. Joseph Giordano Teohnloal Direotor Froduota Nesearoh * Chomloal Oorp. 410 Jersey Avenue Olouoeater City, Hew Jersey 08030 Dear Nr. Giordano: Your requoat for Information and atatua on our ohlorlnatad terphenyl produot line haa bean re ferred to mo for oomment by our aaloa ropraaantatlva, John Van Gaidar. Aa X underatand your need, you would like to know more about 1) the behavior of ohlorlnatad terphenyle in the environment, 2) the KB oontent in these produota and 3) our long term plana for theae produota in the market. Aa you know, wo made our deolalon last spring to with draw KBs from open system applications. Needless to say, this deolalon waa made only after muoh deliberation and evaluation of the data available to ua. Baaed on this study, wa eonoluded that it would be in the beat interests of Monsanto, our ouatomera, and the environ ment to atop selling KBs into open system applloatlona. Wa believe that thla waa a good deolalon based on the faeta available at that time. All during our evaluation of KBs In the environment, we attempted to find some evldenoa that pelyohlorineted terphenyle (KVa) ware also affeeting the eeelegy. At ne time did we find these materials In the environment. Blnoe laat spring, we have oontlnued te searoh for KVa MONS 009776 Mr. Joaaph dlordano a- April 19, 1971 In the environment and our finding* *r* atlll the am*. KT* do not ahow up in tha lakaa, atraama, flah, bird* or ofehar natural atdtaa. Whlla Nonaanto would Ilka to b* abla to aay that wa haya a oomplata axplanatlon aa to why ohlorlnatad tarphanyla da not appaar in tha anvironmant, thla la not tha oaaa. Wa ballav* that in ganaral, thay raaiat bladagradatlon to a dagraa almllar to tha POB*. However, wa do know that tha ohlorlnatad tarphanyla ara much, muoh lata aolubla in watar than thalr ohlorlnatad blphanyl analog*. Thla would oartalnly make than laaa availabla In tha atreami and lakaa, and thua laaa llkaly to antar tha food ohaina. further, judging fro* l) tha alee and oonflguratlon of the two molaoulaa, and 8) tha ralatlvo aolublllty data of ohlorln atad biphenyl and ohlorlnatad terphenyl In organlo aolvanta Ilka hexane, ona would oartalnly b* lead to the oonolualon that tha ohlorlnatad tarphanyla ahould be laaa aolubla than ohlorlnatad biphenyl* in tha fatty tlaaue* of anlaiala, Haro again, thla would make it more dlffloult for the ohlorlnatad tarphanyla to antar tha food ohain. Our ourrant KB oontant In our ohlorlnatad terphenyl line la laaa than 0.40 by weight. Wa ara bringing a plant modification projaot on atream at the and of thla year which will raduoa thla laval to approximately O.Oljt. Wa ara oonfldent that thla la a laval whloh will not oauaa any environmental problem*. Whan Nonaanto mad* it* daolalon laat aprlng to withdraw ohlorlnatad biphenyl* from open ayatam *pplloatlona, and to laavo ohlorinatod tarphanyla on tha market, w* oon- aldarad all tha information whloh waa availabla to ua at that tin*. The oommanta given above aummarlaad aoma of the thinking that want into that daolalon. Sine# laat aprlng, w* have oontlnuod our atudlaa and our evaluation*, and have not aa yet formed any now data whloh would tond to ohanga our daolalon. W* fully , xpaot that tho ohlorlnatad tarphanyl product* will remain in our product line. HONS 089777 Nr. Joaoph Olordano -3- April 19# 1971 1 hope toheee oommenta will be helpful to you ae you prooeed with your prograa of reformulation. fleaae fool froo to oontaot ua If wo oan bo of further sorvloo or If wo oan provide additional Information to you. Vary reapeotfully. /dbw V, B. Papageorge Manager, Knvlronmental Control MANS 089778