SODIUM DIHYDROGEN PHOSPHATE
Prepared at the 7th JECFA (1963), published in NMRS 35 (1964) 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 Monobasic sodium phosphate, monosodium monophosphate sodium acid phosphate, sodium biphosphate; INS No. 339(i)
DEFINITION
Chemical names Sodium dihydrogenphosphate, monosodium dihydrogenortho- phosphate, monosodium dihydrogen monophosphate
C.A.S. number 7558-80-7
Chemical formula Anhydrous: NaH2PO4
Monohydrate: NaH2PO4 · H2O
Dihydrate: NaH2PO4 · 2H2O
Formula weight Anhydrous: 119.98
Monohydrate: 138.00
Dihydrate: 156.01
Assay Not less than 97% after drying
DESCRIPTION White odourless, slightly deliquescent powder, crystals, or granules
FUNCTIONAL USES Acidity regulator, sequestrant
