Sodium Tripolyphosphate(STPP)
Chemical formula:Na5P3O10
Molecular weight:367.86
Specification:
RE: Sodium Tripolyphosphate(STPP)
Na5P3O10: 94.0%Min
P2 O 5 :57.0%Min
Water Insoluble Matter: 0.15%Max
Iron(Fe): 0.015%Max
PH value (1% water solution) : 9.2-10.0
Whiteness: 92%Min
Ignition loss: 1.0
density (g/cm3): 0.35-0.9
Phase I: 10-30
Properties: White powder, surface density: 0.35-0.9g/cm3, melting point:622℃, free soluble in water, aqueous solution appears acid. It is a kind of inorganic surface active agent.
Application: Used as one of the main auxiliaries for synthetic detergent, synergist for soap; water softener, tanning agent for leather making, auxiliary for dyeing; As an effective dispersion agent for suspensions of coatings, kaolin, magnesium oxide, calcium carbonate and drilling mud etc.; As an oil contamination resistance agent in paper production. In foodstuff industry it is used as quality improver in the process of canned food, fruit juice drinks, foodstuffs from milk or soybeans. It may tender the meat in canned ham and soften the skin of horse bean in canned horse bean. It may also serves as a softener or densifier in foodstuff industry.