... > Sodium Hexametaphosphate's Properties: a) White powder, density is 2.484 (20°C), easily soluble in water, but not in organic solution ... ) it is mainly used as a water softening agent in solution for printing, dyeing, and boiler; Diffusant in papermaking; slow corrodent ... a well ventilated, dry place. best price and high purity Sodium Hexametaphosphate(SHMP) 68% as water softening agent in solution