... , Ba, Mg, Cu and FeUse: 1. Technical grade: Used in such industries as oil field, paper-making ... detergent and soil analytical chemical reagent;2. Food grade: Mainly used as additive agent, pH adjusting agent, ... fermenting agent, and nourishment, etc.Industrial and Food Grade Specifications: Index nameFood GradeIndustrial gradeMain content (based on P2O5 ... polypropylene woven bag. SHMP 68%min Tech Grade