150MT Sodium Hexametaphosphate (SHMP)68% ready to ship. SHMP other name Calgon,is an inorganic substance with molecular formula (NaPO3) 6. It is a white powder crystal, or a colorless transparent glass sheet or block solid. Soluble in water, insoluble in organic solvents. It has strong hygroscopicity. When exposed to the air, it can gradually absorb water and form a viscose. It can form soluble complexes with calcium, magnesium and other metal ions. It is widely used in food and industrial fields. As the market is in short of storage, we can keep offer cargo still.