... ,68%,white powder 4,High quality and competitive price Sodium Hexametaphosphate (SHMP) No.SpecificationsIndustrial GradeFood Grade1Total ... , as P2O5%>=68.068.02Inactive 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. ... 20 feet container. Sodium Hexametaphosphate-SHMP price