... insoluble %≤0.050.063> Sodium Hexametaphosphate's Application:a) For industrial use, such as oil field, paper-making, textile, dyeing, petrochemical ... , and nourishment;c) it is mainly used as a water softening agent in solution for printing, dyeing, and boiler; Diffusant in ... price and high purity Sodium Hexametaphosphate(SHMP) 68% as water softening agent in solution