26499-65-0 AI3-01697 Crystacal Densite Densite (gypsum) FGR Gypsum hemihydrate Hemihydrate gypsum Plaster of Paris (Ca(SO4).1/2H2O) (9CI) Plaster of Paris, respirable fraction Plaster of Paris, total dust Plaster of paris Sulfuric acid, calcium salt (Plaster of Paris) TA 20