Sodium Hexametaphosphate (SHMP)---Food Additive Description: White powder or granular. The density is 2.484(20°C). It is soluble in water easily, but it isn't soluble in organic impregnant It is a good agent for water treatment. Specifications Food AdditiveTotal phosphate, as P2O5 % ≥ 68.0Inactive phosphate, as P2O5 % ≤ 7.5Fe % ≤ 0.05PH Value of 1% water solution 5.8-6.5Heavy metals, as Pb % ≤ 0.001Arsenic, as As % ≤ 0.0003Fluoride, as F % ≤ 0.003Water insoluble % ≤ 0.06It is mainly used as additive agent, PH adjustive agent, ferment agent, nourishment agent and so on.