Definition | Ammonium carbonate consists of ammonium carbamate, ammonium carbonate and ammonium hydrogen carbonate in varying proportions |
Chemical name | Ammonium carbonate |
Einecs | 233-786-0 |
Chemical formula | CH6N2O2, CH8N2O3 and CH5NO3 |
Molecular weight | Ammonium carbamate 78,06; ammonium carbonate 98,73; ammonium hydrogen carbonate 79,06 |
Assay | Content not less than 30,0 % and not more than 34,0 % of NH3 |
Description | White powder or hard, white or translucent masses or crystals. Becomes opaque on exposure to air and is finally converted into white porous lumps or powder (of ammonium bicarbonate) due to loss of ammonia and carbon dioxide |
Identification | |
A.Positive tests for ammonium and for carbonate | |
B.pH of a 5 % solution | about 8,6 |
C.Solubility | Soluble in water |
Purity | |
Non-volatile matter | Not more than 500 mg/kg |
Chlorides | Not more than 30 mg/kg |
Sulphate | Not more than 30 mg/kg |
Arsenic | Not more than 3 mg/kg |
Lead | Not more than 5 mg/kg |
Mercury | Not more than 1 mg/kg |