AMMONIUM CARBONATE
Prepared at the 26th JECFA (1982), published in FNP 25 (1982) and in FNP 52 (1992). Metals and arsenic specifications revised at the 59th JECFA
(2002) An ADI 'not specified' was established at the 26th JECFA (1982)
SYNONYMS INS No. 503(i)
DEFINITION Consists of ammonium carbamate, ammonium carbonate and ammonium
hydrogen carbonate in varying proportions
C.A.S. number 10361-29-2
Chemical formula CH6N2O2, CH8N2O3CH5NO3
Structural formula NH2COONH4(NH4)2HCO3NH4HCO3
Formula weight Ammonium carbamate 78.06
Ammonium carbonate 98.73
Ammonium hydrogen carbonate 79.06
Assay Not less than 30.0% and not more than 34.0% of NH3
DESCRIPTION White powder or hard, white or translucent masses of crystals with an odour of ammonia. On exposure to air it becomes opaque and is finally converted into white porous lumps or powder (of ammonium bicarbonate) due to loss of ammonia and carbon dioxide.
FUNCTIONAL USES Acidity regulator, raising agent
