... 1.purity:68% 2.Sodium Hexametaphosphate(shmp) in food or industrial grade 3.MSDS certiicate and OEM accepted Regulations: Standard/indexTop ... 02maxFe %0.03maxPH of 1% solution%6.5max. Application :1. For industrial use, such as oil field ,paper-makeing ,textile, dyeing , ... is mainly used as a water softening agent in solution for printing , dyeing ,and boiler ,diffusant in papermaking ,retarding agent ...