... ,Mg,Cu and Fe;It is a fine agent for water treatment.Specification: itemsIndustrial gradeFood gradeTotal phosphate (P2O5)68% min68% minInactive ... and building material industry, it is mainly used as a water softening agent in solution for printing, dyeing, and boiler; ... dry warehouse instead of in the open air,kept away from water,moisture and sunlight during transport,handled with care,so as ...