... Ba, Mg, Cu and Fe; it is a fine agent for water treatment. 2>Sodium Hexametaphosphate's Technical Specifications: ... b) it is mainly used as additive agent, PH adjusting agent and fermentation agent, and nourishment;c) it is mainly used ... , and boiler; Diffusant in papermaking; slow corrodent, floating agent, dispersing medium, high temperature agglomerant, detergent and soil analytical chemistry reagent ...