Product Name: Sodium Sulphate Anhydrous Molecular Formula: Na2SO3 Application: mainly used in detergents, textiles, photography, dyestuffs, paper-making, glass, water treatment, porcelain, foodstuff etc.Specification: 1) Content: 99% min. 2) Chloride 0.001% max. 3) Phosphates 0.001% max. 4) Nitrites 0.0005% max. 5) Potassium 0.01% max. 6) Iron 0.0005% max. 7) Calcium 0.002% max. 8) Heavy metals 0.0005% max. Packing: 50kg net plastic woven bag We can supply the product of different grade.