... of Sodium Tripolyphosphate (STPP) 2,Free sample 3,High quality and competitive price 4,Quickly deliveryProduct DescriptionProduct: Sodium Tripolyphosphate ... .86 1, Properties: White microdot powder with luster, melting point at 622 o C, easily soluble in water, ... of synthetic wash, soap synergistic agent, water softener, leather pre-tanning agent, dye auxiliary agent, and dispersant of suspension such ...