TRISODIUM PHOSPHATE
Prepared at the 19th JECFA (1975), published in NMRS 55B (1976) and in FNP 52 (1992). Metals and arsenic specifications revised at the 59th JECFA (2002). A group MTDI of 70 mg/kg bw, as phosphorus from all food sources, was established at the 26th JECFA (1982).
SYNONYMS Tribasic sodium phosphate, sodium phosphate; INS No. 339(iii)
DEFINITION
Chemical names Trisodium orthophosphate, trisodium phosphate, trisodium monophosphate
C.A.S. number 7601-54-9
Chemical formula Anhydrous: Na3PO4Hydrated: Na3PO4 · xH2O
Formula weight Anhydrous: 163.94
Assay Anhydrous, hemihydrate and monohydrate: Not less than 97.0% calculated on the dried basis
Dodecahydrate: Not less than 92.0% calculated on the ignited basis
DESCRIPTION White odourless crystals, granules or a crystalline powder; hydrated forms available include hemi- and monohydrates, hexahydrate, octahydrate, decahydrate and dodecahydrate; the dodecahydrate contains 1/4 mol of sodium hydroxide.
FUNCTIONAL USES Buffer, sequestrant, emulsion stabilizer
