Formula Na₃PO₄, molecular weight 164. The anhydrous form is a white powder, efflorescent, soluble in water and insoluble in organic solvents, with an alkaline aqueous solution whose 1% solution shows a pH of 12.1 and a relative density of 2.537; the dodecahydrate (CAS 10101-89-0) is a white or colourless crystal that loses its water of crystallisation at about 100 °C. Industrially it serves as a water softener and detergent builder, boiler scale inhibitor, dye-fixing agent in printing and dyeing, flux in enamelling, metal surface treatment agent and water treatment chemical. In food it acts as an emulsifier, nutritional supplement and quality improver. Packed with an inner plastic liner and an outer woven bag, 25 kg, 50 kg or 1000 kg net per bag; store in a ventilated, dry place.
