Assay(as Na2H2P2O7)% 95.0% P2O5% 63.0%-64.0% PH Value 3.5-4.5 Water Insoluble %í_ 1.0 Fluoride (as F) % í_ 0.005 Heavy Metals (as Pb) % í_ 0.001 Arsenic (As)% í_ 0.0003 Loss on ignition(105íµ) %í_ 0.5. Chemical formula : Na2H2P2O7 Molecular weight: 221.95 CAS Number: 7758-16-9
