Document 995mKere3kVYkoejKp2a6n5N6

tSTUUSKIDISM E. I. d u Po n t d e Ne mo u r s & Co mp a n y IMCONPOKATEO Wil min g t o n , De l a w a r e i9S98 EMPLOYEE RELATIONS DEPARTMENT HASKELL LABORATORY ram TOXICOLOGY AND INDUSTRIAL MEDICINE Wfotjr 22, 1973 R. H, Rigdon, M.D, Professor of Pathology The University of Texas Medical Branch Galveston, Texas 77550 Dear Dr* Rigdon: Your letter to Dan Pugh was .Sozwax^sd-. to me for reply. X assume the pigment you jpefjea: Is as Watchung Red Y is also known as Pigment Red 48, loc Jtadex No. 15865. The first and second components: of this? ptgment are 6-chloro~4-toluidine-3-sulfonic aeifi amdi '3-hydroxy-2naphthoic acid. This azo complies: is pEsripitated as the barium salt. The commercially awaOifo&e product may contain up to five percent precipitate Tharium staybelite resin (a .hydrogenated rosin) plmis about two percent of water-soluble salts. We speculate the pipment would have a negative charge. Please .nontact Dan Pugh,, mxsc .local sales manager, for additional orders. Sincerely-,-- RNDt jmh ccr D. B. Pugh Department iSsustxm, Texas 77027 Riebard N. Dion dhief. Information Section - /TT^Ts'TKiNOS FOR BETTER LIVING . . . THROUGH CHEMISTRY