Sodium sulphate anhydrous Specification: Sodium sulphateú¿na2so4ú¬ :99.0%min Water-indissoluble :0.05%max Calcium magnesium (count mg) : 0.15%max. Chlorideú¿count clú¬ :0.35%max. Fe : 0.002%max. Water : 0.20%max Whiteness :82 %min Ph value 9-11 Packing: 50kg pp/pe bag 25kg/pp pe bag