The Sodium Sulphate Anhydrous min 99%, White content purity min 88%, Industrial Grade, PH value:6-8 About us : Qingdao Central ... beautiful seaside city ,which engages in the manufacturing and marketing of Sodium sulfate , Cryolite , Soda ash , Edible alkali, Polyaluminium Chloride, Polyacrylamide ... %<0.00150.008moisture, %<0.100.30whiteness, % min8680 The specification of Sodium Sulphate Anhyrous99%