Document L8nn5KyNao2Dwbj0J7DgYGZg

August 18 , 1970 Dr. A lex F. Robertson Associate Professor Department of Pediatrics ........ The Ohio's tat University Hospitals'"'".., 410 West 10th Avenue Columbus, Ohio 43210 Dear Dr. Robertson: I am sorry to send you a belated answer to your letter of July 13 which wab addressed to our Kenilworth location and finally arrived in St. Louis. We tried to call you last week but found you were out of town. I am completely confused concerning your proposed use and find it hard to know what information you want concerning the products. We do have a compound called Aroclor which is a chlorinated bi phenyl and chlorinated to various chlorine percentages. There is one chlorinated to 42%, called Aroclor 1242. This is a liquid which is used either as a dielectric or heat transfer aqency. It has a relatively low order of acute toxicity, although it does exhibit a higher toxicity from a lonq-ranqe point of view, Do you intend to immerse the placental tissue in the liquid Aroclor and how long an exposure will the tissue have? If you could enlighten me about your proposed use perhaps I could be more helpful to you. sincerely. REK/ln R. Emmet Kelly, M. D. Medical Director TRAN 039644 HARTOLDMONOQ25969