Document dYOax650NGbQQMz6j53mvGGy6

April 28, 1952 'N'V' Dr. B. S. Oppenhelaer 12b Bast 6lst Strest Hew York 21, Hew York Rot Vinyl 1to Vila Poodyar Dear Doctor Oppenhelneri Thank you vory such for sending to as a copy of tho formula of tho vinyl chloride film which you used in your rat la* plant studies. You will note hy the ooaposltlon of the saae that these ay quite complex aaterials which contain many other ohealcals aside from the vinyl chloride copolymer itself. Zt contains a phthalate type plasticizer and appayntly sene organic and in rganle ?hheo8cpohlaoterisn,ginaaatedrdiaitllstonusteod. sons tin compounds. They do not w I would suspect that from the eonp al si* tlon of the flla you used It would be impractical to say that tho rasuits you obtained my duo to tho vinyllto Itself. X would appyelato it, yry much, if you would lot as have two or thyo yprlnts of your article which has appoayd in the Praceedlngs of tho Society of Experimental Hedioino and Biology, March 1952, since we do not subscribe to this Journal. Z ham n t had an opportunity of studying your final paper. Thank you very kindly for your continued inteyst. Kith warm personal ygards, I yaaln. Sinceyly youro. than. v. Halo, H.D. INDUSTRIAL N8DZ0AL h TOXZCOLOOY DBPARXMBHT UCC 063456 DE.B, S. OPPENHEIMEE 124 East 61*? Street NettYore 21.N.Y JEMPLETOM 8-6589 April 19f 1952 Dr. Thomas W. Nale Union Carbide and Carbon Corp. 30 East 42nd Street New York 17, N. Y. My dear Dr. Nale: I am enclosing herewith an answer from the Good-Year Company on the formula for the Vinyl chloride C/UjL c**t**-film which we use in our experiments on rodents. ucc 063457 C 0 P Y April 14, 1952 Dr. B. S. Oppenhelmer 124 East 61st Street New York 21, N. Y. Dear Dr. Oppenhelmer: In reference to your letter of March 6 requesting information regarding the chemical contents of the Goodyear Vinyl Film(poly vinylchloride) which we sent to you sometime back for experiments, I would like to quote to you the following infor mation which is as complete as we can possible make it. You will note that chemical formulations are not included for two reasons, No. I From time to time the chemical composition is slightly changed and No. 2 Some of our chemical formulations are considered confidential company matter. However, I sincerely hope that the following information will be of use to you. The Vinyl Film that you received contained the following chemical type materials at that particular time of manufacture jwhen I sent you sanples: Vinyl chloride copolymer Phthalate type plasticizer Sebacate Phosphate Tin-Cadmium, Tin-Calcium or lead salts An organic phosphate Coloring materials; organic and/or inorganic If you still have a small piece of the material I sent to you, I would appreciate your sending it to me and we will be only too happy to give you information regarding the metallic salts and the chemical nature of the colorants used in thafc particular film. ? would like to assure you that we take great pleasure in cooperating with any enterprise that will further the cause of the general public as a whole. Respectfully yours, J. F. Chartier Vinyl Film Representative Films and Flooring Division UCC 063458