Sodium Tripolyphosphate (STPP) Synonyms: triphosphoric acid pentasodium salt, pentasodium triphosphate, tripolyphosphate pentasodium, sodium triphosphate, STPP, armofos, empiphos stp-D, freez-gard FP 19, polygon, rhodiaphos H5, thermphos, tripoly Molecular formula: Na5P3O10 Specifications:ITEMS STANDARDPURITY(As Na5P3O10): 94% MIN.Total Phosphorous(as P2O5): 57%MIN.Water insoluble: 0.06 %MAX.Iron: 0.009%MAX.PH Value: 9.2-10Particle size(1mm screens test retained on mesh) 2%MAX.Bulk density( g/cm3 ): 0.65-0.75 Packing: 25KGs PP bag. Application: builder in laundry powder, sequestrant, chelating agent,Detergent,Detergents & Dishwashing Tablets,( liquid ) Cleaners, Food & Feed industry, in Brines, in the Seafood and Meat industry,Slurries.