... .Appearance Dark gray, gray, yellow , loose powder.Make Makeing From phosphate rock and sulfuric acid by the chemical reactions ,then to ... •H2O],(CaSO4)Others components Phosphoric acid, free water, iron phosphate, aluminum phosphate, magnesium dihydrogen phosphate dihydrate, fluoride acid, fluoride salts, acids and other impurities ... once, and ventilation should be stacked in a dry Powder Phosphate