Document k26JwJ3jJL25NJ4YRaY8okyE

To: Mr. E. K. Hamilton From: J. J. Marino Subject: Panelex Insulation June 19. 1972 Attached is an opinion from Dr. E. E. Stokinger on the health hazard of our Panelex insulation. Would you please review the document and let me know if any changes have to be made to our OSHA Data Sheet? J. J. Marino Ends. JJM/ab cc: Mr. W. Herberger - Old Bridge 1 6689 0CPU*1MCHT OF HEALTH. EL '.AnC/i AIJE1LIC HfALI II .lltvif-r. HLALMI ^i.nvicrs AND Mr.NTA 'I M.m A No .YtT L-.\ i;l r ''I June 13, 1972 1014 broadway Cincinnati, Ohio 45202 National Inst i lulu fur Safety and Health t ioua 1 Mr. Joseph Moreno Quigley Company, Inc. Pfizer Subsidiary 235 E. 42nd Street New York, N. Y. 10017 Dear Mr. Moreno: In response to your telephone rail of June ti regarding an opinion on the safety of a new insulating material of the following composition: Light cement 38.52 Perlite 9.02 "Vormicu li to , expanded 26.0% "ball clay 22.4% Plaster of Paris 1.5% Vinsol resin-less than 1.0% Diatomaceous earth 2.5% a review of the health hazards of the various components would indicate that provided the quartz content of any of the components does not exceed 3% (e.g. Perlite), an exposure below 10 mg/m^ of respirable dust would appear permissible. Sincerely yours, Enclosure Documentation for Perlite Herbert E. Stokingcr, Ph.l). Chief, Toxicology Branch Division of Laboratories and Criteria Development 1 6692