Document gDrE1o3YDM5BEBV2ozB004Xxa

bee: J.C. Weber - B23K June U, 1976 Or. Robert J. Everson Animal Disease Diagnostic Laboratory School of Veterinary Medicine Purdue University West Lafayette, Indiana 47907 Dear Dr. Everson: In regards to your letter to J. Coleman Weber dated June 7, requesting toxicity Information sheets for AROCLOR 1242, and 1254, we do not have written statements hsse materials. The rat oral LDcn values for these compounds are: AROCLOR 1221 - 3,9% SgAg; AROCLOR 12422 8,650 mg/kg, and AROCLOR 1254 - 11,900 mg/kg. I have enclosed pages 51 and 52 taken from Documentation of the Threshold Limit Values by the American Conference of Governmental Industrial riyglenlsts, Third Edition, 1971. These two pages give the TLV's for 1242 and 1254 plus some additional In formation and references. During the past several years, evidence has accumulated that polychlorinated biphenyls can have adverse ecological and toxicological effects. Care should be taken to prevent these materials from entry Into the environment through spills, leakage, use, or disposal. Very truly yours /bkp enc. James Lavsglia, FhD Senior Toxicologist HONS 095014