... 7758-29-4 EINECS NO.: 237-004-9 Sodium Tripolyphosphate (STPP)Synonyms: triphosphoric acid pentasodium salt, pentasodium triphosphate, tripolyphosphate pentasodium, ... sodium triphosphate, STPP, armofos, empiphos stp-D, freez-gard FP 19, polygon, ... with the standard of GB25566-2010 Sodium Tripolyphosphate(STPP)