... of Sodium Tripolyphosphate (STPP) 2,Free sample 3,High quality and competitive price 4,Quickly delivery Product DescriptionProduct: Sodium Tripolyphosphate ... without causticity. 2, Usage: Used as main auxiliary of synthetic wash, soap synergistic agent, water softener, leather ... pre-tanning agent, dye auxiliary agent, and dispersant of suspension such as paint, kaolin, magnesium oxide, calcium ...