... alkali, Polyaluminium Chloride, Polyacrylamide, Polyaluminium Ferric Chloride ,Polymerization iron sulfate , potassium sulfateand Sodium Tripolyphosphate . And our products mainly ... , leather making agents, paint, dyeing auxiliaries, kaolin, magnesium oxide, calcium carbonate, such as industrial acid in suspension ... oil pollution prevention agents. Sodium Tripolyphosphate(STPP)--High Quality Chemicals