... and competitive price 4,Quickly delivery Product DescriptionProduct: Sodium Tripolyphosphate (STPP)CAS No.: 7758-29-4 Molecular ... synthetic wash, soap synergistic agent, water softener, leather pre-tanning agent, dye auxiliary agent, and dispersant of suspension ... kaolin, magnesium oxide, calcium carbonate drilling mud, preservative agent for paper making, organic synthesis catalyzer, and used ...