1. purity: 68%min 2. free sample 3.Custom Packaging ... solvent compound with metallic ions such as Ca,Ba,Mg,Cu and Fe;It is a fine agent for water treatment.Specification: ... , floating agent, dispersing medium, high temperature agglomerant, detergent and soil analytical chemistry reagent. For food grade, additive agent,PH ... from poisonous. HOT SALE! --Sodium Hexametaphosphate 68% for water treatment