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Ammonium Carbonate
Ammonium Carbonate
Ammonium carbonate is a salt that readily degrades to gaseous ammonia and carbon dioxide upon
heating, it is used as a leavening agent and also as smelling salt. It is also known as baker's
ammonia and was a predecessor to the more modern leavening agents baking soda and baking powder.
Ammonium carbonate decomposes at standard temperature and pressure through two pathways. It has a
short shelf life.
Ammonium carbonate CAS 506-87-6 Einecs EC 233-786-0 is a salt with the chemical formula (NH4)2CO3
and molecular weight 96.09. Since it readily degrades to gaseous ammonia and carbon dioxide upon
heating, it is used as a leavening agent and also as smelling salt. It is also known as baker's
ammonia. Pure Ammonium carbonate is distinctly different from Ammonium Carbonate reagent, USP and
FCC grades which consists of ammonium bicarbonate (NH 4HCO3) and ammonium carbamate (NH2COONH4) in
varying proportions.
General Specifications and Properties of ammonium Carbonate:
Appearance: White powder.
Ammonia content: 35%. It is an unstable compound and the assay as NH3 may go down.
Relative density: 1.5
Melting point: 58C.
Solubility: Soluble in water.
Ammonium Carbonate USP
Carbonic acid, monoammonium salt, mixture with ammonium carbamate.
Monoammonium carbonate mixture with ammonium carbamate [8000-73-5].
Ammonium Carbonate consists of ammonium bicarbonate (NH 4HCO3) and ammonium carbamate (NH2COONH4) in
varying proportions. It yields not less than 30.0 percent and not more than 34.0 percent of NH3.
Packaging and storage: Preserve in tight, light-resistant containers, at a temperature not above
30C.
Identification: When heated, it is volatilized without charring, and the vapor is alkaline to
moistened litmus paper. A solution (1 in 20) effervesces with acids.
Residue on ignition: not more than 0.1%.
Chloride: Maximum 0.0035%.
Sulfate: A 2.0-g portion shows no more sulfate than corresponds to 0.10 mL of 0.020 N sulfuric acid
(0.005%).
Heavy metals: the limit is 0.001%.
Assay: Place in a weighing bottle about 10 mL of water, tare the bottle and its contents, add about
2 g of Ammonium Carbonate, and weigh accurately. Transfer the contents of the bottle to a 250-mL
flask, add 50.0 mL of 1 N sulfuric acid VS, and, when solution has been effected, add methyl orange,
and titrate the excess acid with 1 N sodium hydroxide. Perform a blank determination. Each mL of 1 N
sulfuric acid is equivalent to 17.03 mg of NH3.
Ammonium Carbonate FCC Food Grade
INS: 503(i); CAS: [10361-29-2]
DESCRIPTION
Ammonium Carbonate occurs as a white powder or as hard, white or translucent masses. It consists of
ammonium bicarbonate (NH4HCO3) and ammonium carbamate (NH2·COONH4) in varying proportions. On exposure
to air it becomes opaque and is finally converted into porous lumps or a white powder of ammonium
bicarbonate because of the loss of ammonia and carbon dioxide. One gram dissolves slowly in about 4 mL
of water. Its solutions are alkaline to litmus.
Function: Buffer; leavening agent; neutralizing agent.
REQUIREMENTS
Identification: When heated, a sample volatilizes without charring, and the vapor is alkaline to
moistened litmus paper. A 1:20 aqueous solution effervesces when an acid is added.
Assay: Not less than 30.0% and not more than 34.0% of NH3.
Chloride: Not more than 0.003%.
Lead: Not more than 3 mg/kg.
Nonvolatile Residue: Not more than 0.05%.
Sulfur Compounds (as SO4): Not more than 0.005%.
Ammonium Carbonate Analytical Reagent Grade
CAS Number 8000-73-5
NOTE. This product is a mixture of variable proportions of ammonium bicarbonate and ammonium
carbamate.
REQUIREMENTS
| Assay | ≥30.0% NH3 |
|---|
| Insoluble matter | 0.005% |
|---|---|
| Nonvolatile matter | 0.01% |
| Chloride (Cl) | 5 ppm |
| Sulfur compounds (as SO4) | 0.002% |
| Heavy metals (as Pb) | 5 ppm |
| Iron (Fe) | 5 ppm |
Certifications :
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