... quality STPP 95% ,through the ISO 9001 Sodium Tripolyphosphate (STPP)Chemical formula: Na5P3O10 Molecular weight: 367.86 Standard executed: ... 10Chloride, as Cl % ≤ - Application: 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 ...