... Formula: Na5P3O10 Molecular weight: 367.86 1, Properties: White microdot powder with luster, melting point at 622 o C, easily soluble ... alkaline, without causticity. 2, Usage: Used as main auxiliary of synthetic wash, soap synergistic agent, water softener, leather pre-tanning agent ... in the open air. 2011Hot sale Sodium Tripolyphosphate(94.0% min)