Ammonium Carbamate

Title: Ammonium Carbamate
CAS Registry Number: 1111-78-0
Additional Names: "Anhydride" of ammonium carbonate; ammonium aminoformate
Molecular Formula: CH6N2O2
Molecular Weight: 78.07
Percent Composition: C 15.38%, H 7.75%, N 35.88%, O 40.99%
Line Formula: NH2COONH4
Literature References: Prepd from dry ice and liq ammonia: Brooks, Audrieth, Inorg. Synth. 2, 85 (1946).
Properties: Cryst powder; ammonia odor; gradually loses ammonia in the air changing to ammonium carbonate. Volatilizes at about 60°. Freely sol in water; sol in alcohol.
Use: Ammoniating agent, less vigorous than NH3.
Ammonium Carbonate Ammonium Cerous Sulfate Ammonium Chloride Ammonium Chromate(VI) Ammonium Chromic Sulfate

Ammonium carbamate
Ammonium carbamate 2-d.gif
Identifiers
CAS number 1111-78-0
PubChem 517232
ChemSpider 451267
EC-number 214-185-2
UN number 9083
RTECS number EY8575000
Gmelin Reference 14637 (G)
Jmol-3D images Image 1
Properties
Molecular formula CH6N2O2
Molar mass 78.0705 g/mol
Appearance Colorless, rhombic crystals
Density 1.38 g/cm3 (20 °C)
Melting point 152 °C
Boiling point 251 °C at 760 mmHg
Solubility in water Freely soluble in water
Solubility Soluble in alcohol
log P −0.47 in octanol/water
Vapor pressure 492 mmHg(51 °C)
Hazards
MSDS External MSDS
GHS pictograms The exclamation-mark pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)
GHS signal word WARNING
R-phrases R22, R23, R24, R34, R36, R38
S-phrases S3, S20, S24, S25, S43, S60
Main hazards Harmful if ingested, harmful to aquatic life, harmful if inhaled, respiatory tract irritation, skin irritation, eye irritation
NFPA 704
NFPA 704.svg
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1
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Flash point 105.6 °C; 222.1 °F; 378.8 K
LD50 1,470 mg/kg in a rat
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Ammonium carbamate is a salt of ammonia and carbamic acid. This compound is a white solid that is extremely soluble in water, soluble in alcohol, and only slightly volatile at room temperature. It is prepared by the direct reaction between liquid ammonia and dry ice (solid carbon dioxide):[2]

2 NH3(l) + CO2(s) → H2NCOONH4