Technical grade, white powder. P2O5 min 56%, Na5P3O10 min94%, Whiteness min 85%, Phase I 5-40, Fe max 70PPM Sodium Tripolyphosphate (STPP)Synonyms: triphosphoric acid ... , tripolyphosphate pentasodium, sodium triphosphate, STPP, armofos, empiphos stp-D, freez-gard FP 19, polygon, rhodiaphos H5, thermphos, tripoly Molecular formula: Na5P3O10Specifications: INDEXSPECIFICATIONRESULTASSAY (NA5P3O10)94 ...