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 pentasodium salt, pentasodium triphosphate, tripolyphosphate pentasodium, sodium triphosphate, STPP, armofos, empiphos ... )0.35-0.90.8PHASE L10-3026.3 Sodium Tripolyphosphate