Purity/Concentration 98% Purity >99% Packaging Details 25 Kg Bag Grade Industrial Form Powder CAS Number 7778-18-9 Appearance White or almost white, crystalline powder, hygroscopic. Molecular formula CaSO4 Molecular Weight 136.14 g/mol HSN CODE 28332990 Country of Origin Made in India Calcium Sulphate Anhydrous (Pure / USP)