... products meet the standard of FCC and USP. 1,Chemical Name: Sodium Hexametaphosphate,Sodium Tetrapolyphosphate.2,M. F. : (NaPO3)63,M. W. :611 ... ) Name of index GB 1890-1989FCC-IVTotal Phosphate (as P2O5 ) ≥%68.060.0-71.0Inactive Phosphate (as P2O5) ≤%7.5-Water Insoluble ... should be stored separstely from poisonous Substances. FOOD GRADE SHMP Sodium Hexametaphosphate manufacturer