Document 445jo2K9y0QyG8z970d0KN2bQ

INST.'H.rK OF AX-M.YTICA). CHUMISTJIY OSIVJ'liMTV OK SYOUKIiOLk K*,l"r'v;l-v" Stockholm M1, Sweden . Stockholm, February ,.'27, 1967 Hr Ccno C.Ulldc - i. Plasticizer Sales Dept. Monsento Co 800 Lindbergh Bid St Louis, Missouri 651G6. XT.A - . > <.-> . Dear Ur Wilde, . Thank you for your letter of January 24, which was on ny desk when I returned from a leoturo trip to Germany. During this trip I gave a loctuxe at Dayer AG, Leverkuoon, a company manufacturing polychlorinated biphenyls under the trade name of Clophen A 50 and A 50. During the intense discussion which followed my lecture there were no objections to our analytical findings except for the possibility of ono of the Z03 . isomers to bo formed at the decomposition of lindane) over three ehloro bonsene. Although we do not have a scientific proof against this'assumption-- mado by an applieatlon chemist of Payer -- 1 think the reaction is very unlikely end only responsible for one of the FOB Isomers) -The chromatogram added to this letter demonstrates the increase of the higher chlorinated PCB'sthxough a food chain and tho decrease of the lower ones) this is against the "lindane-theory". Remark aleo the non-preaenoe of FOB in a non-aquablo animal. At present we are discussing the plans for the toxiloglcsl investigations to be done in collaboration with prof. Bo Holmstedt, head of the Toxlloglosl Dopt. of the Carolin Institute, liowover, it=~le my fire impression that tho toxlloglcal work to be done is cf such a great extent . that it has to be divided between more toxiloclcal laboratories. Moreover, more analytical work has to be done to aid tho toxicologloal work. During my visit to Germany your Swedloh roprenentont, Rising and Strand Co (l'.r O.Palu) hau been in contact , with Ur Silver. Jensen of this institute. At tboir discussion Ur Palm tins given a manuscript of a lecture which Ur Jensen recently gave for the board of tho Swedish Committee of lrctural Recourses. A copy of thio looturo hco been cent to Monsanto. It has to be MQNS 091225 underlined that, according to the agreement...botTfcon thoeo two gentlemen, thlo canuccript nuot only be ip use inside fconsanro. rieaoe inforra your collecuoe of 1'oncunto of this li&itationT ' Sincerely Yours MGNS 091226 1