Sodium Tri Polyphosphate is a derivative of Phosphoric Acid. Sodium Tri Polyphosphate is moderately soluble in water. Sodium Tri Polyphosphate is a white crystalline powder. Sodium Tri Polyphosphate decomposes at 622oC. It should be stored in tightly closed containers in a Room Temperature. Sodium Tri Polyphosphate is used as a Water softener; as a Tanning agent; in a Metal Treatment application & in Food application.