... city ,which engages in the manufacturing and marketing of Sodium sulfate , Cryolite , Soda ash , Edible alkali, Polyaluminium ... Polyacrylamide, Polyaluminium Ferric Chloride ,Polymerization iron sulfate , potassium sulfateand Sodium Tripolyphosphate . And our products mainly export to ... , %:86 MIN. ItemValueType IType IIGrade AGrade Asodium sulfate content, Na2SO4 %>99.198.3water insoluble substance ...