Document MGqwjo3NL934dXpBVo6nQJXZ9

*-- ------- . Submitted by Hr. G. A Ccvan, Eagle-Picher Company, Cinciimatii Ohio* For Determination of Fro Silica Content The following results wore obtained * Acid Soluble Material r "" 6A per cent Combined Silica Material soluble in hydrofluosilieic acid) 93.0 per cent Free Silica (material unsoluble in bydrofluoailicic acid) 0.6 per cent The material was further examined by X-Eay diffraction 9 which showed that it contained a trace (in keeping with the analytical data) of a crystalline quarts compound identified as oc-eristobalite. Interpretation* The potential hassard of the occurrence of silicosis among persons who might inhale the dust of this product would be related only to the minute proportion <f free silica found therein. lobert" A. ehbe, I). ... Director, Kettering Laboratory February 21, l$k9 Material Sources Submitted Required: f "industrial Floor-Dry" $85 Eagle-Picher Company, Cincinnati, Ohio 1-25-1+9 by Mr. G. A. Cowan, Sales Manager "Floor-Dry" Department, Eagle-Picher Company, American Building, Cincinnati 1, Ohio Free Silica Determination Results Acid Soluble Material Combined Silica (material soluble in hydrofluosilicic acid) Free Silica (material insoluble in hydro- fluosilicic acid) ,, 6.1 0.6j This material was also examined by X-ray diffraction technique v/hich showed it to be amorphous but containing a trace of a crystalline quartz compound which was identified as -cristobalite. Reported: 2-8-I1.9 % : Kobert A. Kehoe, M. D. College of Medicine Eden Avenue Cincinnati 19, Ohio February Ik, 194$ E&gle-Fieher Company, American Building, Cincinnati 1, Ohio. Attentions Mr. G. A. Covan, Bales Manager Analyses of Industrial Floor-Dry i/o3 SbO.OO K Z 0005225