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207861

Sigma-Aldrich

Ammonium carbonate

ACS reagent, ≥30.0% NH3 basis

Synonym(s):
Hartshorn salt
Linear Formula:
(NH4)2CO3
CAS Number:
Molecular Weight:
96.09
Beilstein:
4253487
EC Number:
MDL number:
eCl@ss:
38020208
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent

Quality Level

vapor density

2.7 (vs air)

description

Mixture of variable proportions of ammonium bicarbonate and ammonium carbamate

assay

≥30.0% NH3 basis

form

powder or chunks

impurities

≤0.005% insolubles
≤0.01 nonvolatiles

anion traces

chloride (Cl-): ≤5 ppm
sulfate (SO42-): ≤0.002%

cation traces

Fe: ≤5 ppm
heavy metals: ≤5 ppm (by ICP-OES)

SMILES string

N.N.OC(O)=O

InChI

1S/CH2O3.2H3N/c2-1(3)4;;/h(H2,2,3,4);2*1H3

InChI key

PRKQVKDSMLBJBJ-UHFFFAOYSA-N

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General description

Ammonium carbonate is an ammonium salt. It is colorless and is composed of water soluble cubic crystals. It can be synthesized by reacting carbon dioxide with ammonia. It is widely employed as a CO2 source in fire extinguishers. Calorimetric estimation of enthalpies of absorption of CO2 in aqueous solutions of ammonium carbonate in the temperature range of 35-80°C have been reported.
Ammonium carbonate is commonly used in producing ammonium sulfate as a fertilizer. It is formed by the reaction of ammonia and carbon dioxide. Ammonium carbonate is also the principal ingredient of smelling salts because of its characteristic strong ammonia odor.

Application

Ammonium carbonate has been used as a reducing agent in the preparation of an iron-catalyst for supercritical Fischer Tropsch synthesis (SC-FTS). It may also be used in the hydrometallurgical extraction of zinc, copper and nickel.
Ammonium carbonate may be employed in the following studies:
  • Preparation of 3,4-dihydropyrimidin-2(1H)-one and 1,4-dihydropyridine derivatives, via Biginelli and Hantzsch reactions.
  • Preparation of ammonium carbonate buffer.
  • Synthesis of dihyropyridones derivatives.

Packaging

25, 100, 500 g in poly bottle
1, 2.5 kg in poly bottle

Pictograms

Exclamation mark

Signal Word

Warning

Hazard Statements

Precautionary Statements

Hazard Classifications

Acute Tox. 4 Oral

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

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Certificate of Origin

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