Name:Sodium Tripolyphosphate Other Name:STPP Grade:Industry Grade ... Appearance: White powder or granular;Specifications1,Manufacturer of Sodium Tripolyphosphate (STPP) 2,Free sample 3 ... causticity. 2, Usage: Used as main auxiliary of synthetic wash, soap synergistic agent, water softener, ... pre-tanning agent, dye auxiliary agent, and dispersant of suspension such as paint, kaolin, magnesium oxide, ...