Formula Na₅P₃O₁₀, molecular weight 367.86. A white powder or granule with a melting point of 622 °C, readily soluble in water and a strong chelating agent for calcium and magnesium ions, able to soften hard water and turn suspensions into solutions. Weakly alkaline and non-corrosive, it emulsifies lubricating oils and fats strongly, has a bulk density of 0.35–1.0 g/cm³ and exists in two crystalline forms, Phase I (high temperature) and Phase II (low temperature). It is the principal builder of synthetic detergents, a soap synergist, a ceramic aid and a pre-tanning agent, a water softener for industrial use and an effective dispersant for paints, kaolin, magnesia and calcium carbonate drilling muds, as well as an anti-grease agent in papermaking. The food grade improves the quality of canned goods, juices, dairy products and soya milk, tenderises ham and softens bean skins, and also serves as a softener and thickener. Packed with an inner plastic liner and an outer woven bag, 25 kg, 50 kg or 1000 kg net per bag; keep dry and do not stack in the open.
