Chemical formula: K4P2O7 CAS Number: 7320-34-5 Standard executed: National standard Guaranteed Technical Specifications: Specifications Industrial Grade Food Grade FCC-IV Appearance White powder White powder White powder Main contents % e 96.0 96.0 95.0 Iron( Fe) % d 0.03 0.03 0.03 Water insoluble matter % d 0.1 0.1 0.1 Heavy Metals, as Pb 10ppm 10ppm Arsenic( As) 3ppm 3ppm Fluoride 10ppm 10ppm lead ( Pb) 2ppm PH Value 10.0-10.7 10.0-10.7 10.0-10.7 Ortho Phosphate Pass test Pass test Pass test Loss on drying % d 0.5