Sodium sulphate anhydrous is mainly used in paper making, glass making, soap making, synthetic detergent, vinylon, sodium silicate, bleaching, dyeing etc. Pls knidly find the below our product specification:Na2SO4 % ?99.0 Water insoluble matter% ?0.05 Ca & Mg (Mg)% ?0.15 Chloride(Cl)% ?0.35 Fe% ?0.002 Moisture % ?0.20 Whiteness % ?85 Packing is by new seaworthy PP bag with inner one PE bag. One bag is 50Kg