... as Ca, Ba, Mg, Cu and FeUse: 1. Technical grade: Used in such industries as oil field, paper-making, ... , high temperature agglomerant, 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) ...