PENTASODIUM TRIPHOSPHATE
Prepared at the 55th JECFA (2000) and published in FNP 52 Add 8 (2000), superseding tentative specifications prepared at the 20th JECFA (1976) and published in FNS 1B (1977) and in FNP 52 (1992). No ADI was established, but a group MTDI of 70 mg/kg bw, expressed as phosphorus
from all food sources, was established at the 26th JECFA (1982).
SYNONYMS Pentasodium tripolyphosphate, Sodium triphosphate, Sodium tripolyphosphate, Triphosphate; INS No. 451(i)
DEFINITION
Chemical names Pentasodium triphosphate, pentasodium tripolyphosphate
C.A.S. number 7758-29-4
Chemical formula Na5O10P3 · x H2O (x = 0 or 6)
Formula weight Anhydrous: 367.86
Hexahydrate: 475.94
Assay Anhydrous: not less than 85.0% of Na5O10P3 and not less than 56.0% and not more than 58.0% of P2O5
Hexahydrate: not less than 65.0% of Na5O10P3 and not less than 43.0% and not more than 45.0% of P2O5
DESCRIPTION White, slightly hygroscopic granules or powder
FUNCTIONAL USES Sequestrant, texturizer
