Document Edr5xDMwQmBRK5v0xEng56B9V

bcc: H. Bergen - B2SL W. B.- Papageorge - B2SK J. Stapleton - B2SA W. Withers - B2SA. tf)EC 17 1974 t December 17, 1974 w.V* Mr, Mort Whitney, Manager Product Ouallty and Safety West Bend Company West Bend, Wisconsin 53095 Dear Mr, WhjLtneyj I apologise for the delay in confirmlng)our telephone dis cussion concerning the acutf'toxicHy-of our former fire- resistant at transfer fluid, Illness and an un- expected trlp to Europe have kept me out of the office. As I told yoiiu on the telephone, the oral lethal dose of FR-3 In rats was determined to be approximately 11,900 milligrams per kilogran of body weight. For comparison purposes, the Federal Hazi rdous Substances Labeling_ Act defines "Hig_ hly toxic substances" as those materials with a lethal oral "Hose in "rats of >0 ""milligrams or less per kilogram, and "Toxic substances" as those with a lethal dose of between $0 mgAg and '5000 mg We do not hi ive a lethal dose In animals as a result of inhala- tion of vap< >r8 but from infrequent mishaps during manufacture, we conclude that man would not Inhale voluntarily enough vapors to result 1 serious illness. The vapors are Irritating to the eyes and re ^plratory tract at levels which serve to limit ex posure of consequence. You mentioned that you had replaced FR-3 with our THERMINDL 66, You may be Interested in learning that the oral lethal dose in rats of thiq material is approximately 10,200 milligramsAg. Within the limits of toxicological significance at such dosage levels, this number is comparable to the dose previously cited. May I take this opportunity to wish you a very Merry Christmas 11 , DSM 018912 STLCOPCB4005456 Mr. Mort Whitney December 17*' 197^ Page - 2 - and a Happy Holiday Season. Very truly yours. Mp Elmer P, Wheeler Director, Environmental Health DSW 018913 STLCOPCB4005457