We provide the high quality STPP 95% ,through the ISO 9001 Sodium Tripolyphosphate (STPP)Chemical formula: Na5P3O10 Molecular weight: 367.86 Standard executed: GB9983-88 PropertiesWhite microdot powder with luster, melting point at 622, easily soluble in water, with remarkable chelating ability to some metal ions such as Ca2+, Mg2+, can soften hard water, change suspension into solution, slightly ...