TRIPOTASSIUM 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 potassium phosphate, potassium phosphate; INS No. 340(iii)
DEFINITION
Chemical names Tripotassium phosphate, tripotassium orthophosphate, tripotassium monophosphate
C.A.S. number 7778-53-2
Chemical formula Anhydrous: K3PO4Hydrated: K3PO4 · xH2O
Formula weight 212.27 (anhydrous)
Assay Not less than 97.0% of K3
PO4, calculated on the ignited basis
DESCRIPTION Colourless or white, odourless hygroscopic crystals or granules; hydrated
forms available include the monohydrate and trihydrate
FUNCTIONAL USES Buffer, emulsion stabilizer, sequestrant
