Our Sodium Sulfate Anhydrous ( SSA) is natural mineral form of the decahydrate Glauber' s salt. It is hygiene and suitable for industrial applications. Content ( Na2SO4 ) 99% min. Matter insoluble in water 0.1% max Ca, Mg ( Count as Mg) 0.3% max Chloride( Count as Cl) 0.7% max Iron ( Fe) 0.01% max Moisture 0.5% max Whiteness 80% min It is one of the major components in textile and paper industries, detergent manufacturing, cosmetic fillers, etc.