Sodium Tripolyphosphate (STPP)

Detailed introduction:

Chemical formula: Na5P3O10

Molecular weight: 367.86

Standard executed: GB9983-88

Properties: White 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 alkaline, without causticity.