... mainly used as additive agent, PH adjusting agent and fermentation agent, and nourishment;c) it is mainly used as ... papermaking; slow corrodent, floating agent, dispersing medium, high temperature agglomerant, detergent and soil analytical chemistry reagent. For food grade.4> ... Store at a well ventilated, dry place. best price and high purity Sodium Hexametaphosphate(SHMP) 68% as water softening agent ...