Formula Na5P3O10, MW 367.86, CAS 7758-29-4. White powder, m.p. 622 degC, easily soluble in water with remarkable chelating ability for Ca and Mg ions; softens hard water and clarifies suspensions; an inorganic surfactant with strong emulsifying effect. In food industry used as quality improver for canned food, juices, dairy and soymilk, and as softener and thickener. Packed in 25/50/1000 kg plastic-lined woven bags.