... 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 stp-D, freez-gard FP ... LOSS1.01.0DENSITY(G/CM3)0.35-0.90.8PHASE L10-3026.3 Sodium Tripolyphosphate