Appearance: Colorless to white crystalline solid which will fume in air.{{ ; Fuming hygroscopic colourless liquid or colourless-to-white crystals
Products:
CaSO4
Names: Calcium sulfate, Plaster of Paris, DrieriteGypsum, Calcium sulfate (anhydrous), Anhydrous calcium sulfate, Anhydrous gypsum, Anhydrous sulfate of lime, Calcium salt of sulfuric acid, CaSO4, Calcium sulphate, Calcium sulfate anhydrous, Sulfuric acid, calcium salt (1:1), [Note: Gypsum is the dihydrate form and Plaster of Paris is the hemihydrate form.]
Appearance: White solid ; White hygroscopic powder or crystalline powder ; Odorless, white powder or colorless, crystalline solid. [Note: May have blue, gray, or reddish tinge.]