Document 1Q10vw27Z9NzjZkVQjq8Y0D3X

April 23, 1970 Joseph T. Not, N. D. General Medical dree tor Inland Steal Company Bast Chicago, Indiana Daar oei Attached la a copy of statement indicating the tox icity and safe handling information on Pydraul 13$. This indicates that the fluid ia a mixture of chlor inated biphenyl, a phosphate ester, and a high viscosity selected petroleum fraction of low vola tility. Included are the data from our acute range finding toxicity studies and a discussion of some of the mare detailed work done with a companion product. I have enclosed also a copy of a letter which we have recently sent to all of our customers concern ing the polychlorinated biphenyl--ecosystem or environmental contamination problem. I believe a copy of this has been sent to your company since we tried to get such information to each customer but, lacking other appropriate contacts such ss specific pollution engineers in esch company, the letters were directed to purchasing agents. Tims it may or nay not have been brought to your atten tion. Beat personal regards. Sincerely, REKiJu Enclosure R. Emmet Kelly, H. 0. Medical Director = DSW 018530