TRISODIUM DIPHOSPHATE
Prepared at the 69th JECFA (2008), published in FAO JECFA Monographs 5 (2008), based on the previously withdrawn tentative specifications prepared at the 61st JECFA and published in FNP 52, Add 11 (2003). A group MTDI of 70 mg/kg bw, expressed as phosphorus from all food sources, was established at the 26th JECFA (1982).
SYNONYMS Acid trisodium pyrophosphate, trisodium monohydrogen diphosphate; INS No. 450(ii)
DEFINITION Trisodium diphosphate is manufactured by calcining sodium orthophosphate having a Na2O:P2O5 ratio of 3:2
Chemical names Trisodium monohydrogen diphosphate
C.A.S. number 14691-80-6 (Anhydrous)
26573-04-6 (Monohydrate)
Chemical formula Na3HP2O7 . x H2O (x = 0 or 1)
Formula weight 243.93 (Anhydrous)
261.95 (Monohydrate)
Assay Not less than 57% and not more than 59% expressed as P2O5 on the dried basis
DESCRIPTION White powder or grains
FUNCTIONAL USES Stabilizer, leavening agent, emulsifier, nutrient
