... marketing of Sodium sulfate , Cryolite , Soda ash , Edible alkali, Polyaluminium Chloride, Polyacrylamide, Polyaluminium Ferric Chloride ,Polymerization iron sulfate , potassium sulfateand Sodium Tripolyphosphate . And our ... HG/T2517-93) ItemsIndustrial GradeFood GradeAppearance White or Colorless Crystal Powder Main Content 98.0% Min98.0% MinP2O5 18.3% Min ...