sodium hexametaphosphate(SHMP): No. SpecificationsIndustrial GradeFood Grade1Total phosphate, as P2O5%≥68682Inactive phosphate, as P2O5%≤7.57.53Iron, as Fe %≤0.050.054Ph value (1% solution) %≤5.8-7.35.8-6.55SolubilityQualifiedQualified6Heavy metals, as Pb %≤0.0017Arsenic, as As%≤0.00038Fluoride as F%≤0.0039Water insoluble %≤0.050.06