... 9g/cm3, melting point:622°C, free soluble in water, aqueous solution appears acid. It is a kind ... base on Na5P3O10),%94MIN902Phosphorus pentoxide,%57MIN56.53Insoluble substance in water,%0.04MAX0.084Iron content,%0.006MAX0.0075Whiteness,%92MIN906Granularity 1mm ... as main auxiliary of synthetic wash, soap synergistic agent, water softener, leather pre-tanning agent, dye auxiliary agent, and dispersant ...