Document LJzwgJrwpLMxDzmmrR2dQkNnz

March 31, 1964 Dr. Ziwneraann Hygienic Inatltut Gelsenkinchen, Oensany Dear Sr, ZImmersaurau The fydraulc make up & class of synthetic lubricants and , industrial hydraulic fluids, The first formulation, , Fydraul y-e, has been is use for nearly 15 ysrs. Formula tions which have been devolved subce^xently including Pydr&ul AC, fydraul 6^ and Pydraul A-200 have been used extensively for from 5 to 10 rears. In the history of use of these materials there have been no cases of industrial intoxication ifciaft have egas to ay attention, I have been inforoed that there have been several instances where, due to accidental breatedowa of equipment, quantities of these fluids ttave teen sprayed on molten metal or other hasted surfaces. In such eases there undoubtedly has been fairly heavy emission of vapors and to some degree decomposition products. In no case has exposure to personnel resulted in serious systemic illness. The dally exposures of woricars likewise has not resulted in any cases of toxic effects to the best of ray knowledge. if you have sny further questions, please write me directly. Very truly yours. r HSEtnjb R. fiaaet Selly, K.D. Medical Director Original and 4 cc given to Dale Smith for hand carrying to Germany. DSW 586372 STLCOPCB4091706