Formula: H3PO4 CAS Number: 7664-38-2 Standard executed: Tech Grade ( National standard) Food grade ( GB3149-2004) Packing IBC tank or 35KG drum Guaranteed Technical Specifications: Specifications FoodGrade Tech grade Content ( H3PO4) % 75/ 85 75/ 85 Fluoride max % 10ppm Heavy metals( as Pb) max 5ppm Arsenic( as As) max 0.5ppm Chloride as Cl max 5ppm 50ppm SO4 max% 0.005 0.05 Iron Fe max% 0.01 Easy oxidated substance H3PO4 max % 0.012 0.2