DISODIUM HYDROGEN 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 Dibasic sodium phosphate, disodium phosphate, disodium acid phosphate, secondary sodium phosphate; INS No. 339(ii)
DEFINITION
Chemical names Disodium hydrogen phosphate, disodium hydrogen orthophosphate,
disodium hydrogen monophosphate
C.A.S. number 7558-79-4
Chemical formula Anhydrous: Na2HPO4Hydrated: Na2HPO4 · x H2O
Formula weight 141.98 (anhydrous)
Assay Not less than 98.0% after drying
DESCRIPTION Anhydrous: White, hygroscopic, odourless powder
Dihydrate: White crystalline, odourless solid
Heptahydrate: White, odourless, efflorescent crystals or granular powder
Dodecahydrate: White, efflorescent, odourless powder or crystals
FUNCTIONAL USES Emulsifier, texturizer, buffer
