... sodium sulphide, water glass, or used in papermaking, glass, dye and used as filler, dyeing auxiliary, laxative, antidote, t also can ... be used in fiber, lether, metallurgy, enamel and soap. 3. Packing:N.W.: 25kg/bag, 50kg/bag, 1000kg ... .25Ca,Mg≤ 0.150.033WHITE DEGREE≥ 8288.55. Picture of product and packing Industrial Sodium Sulphate Anhydrous 98%min