... filling, metal smelting, glass industry, leather manufacturing etc. Product name: Sodium SulfateMolecular formula: Na2SO4Appearance: PowderPurity: min. 99%, Chloride (Cl) content: max. 0 ... . 0.2%, Water insoluble: max. 0.05%, Whiteness: min. 82, Sodium sulfate anhydrous ph : 6-8