Ammonium carbamate

Ammonium carbamate
Names
IUPAC name
Ammonium carbamate
Other names
hartshorn, sal volatile, ammonium amidocarbonate, ammonium aminoformate, [1]
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.012.896 Edit this at Wikidata
EC Number
  • 214-185-2
14637 (G)
RTECS number
  • EY8575000
UNII
UN number 9083
  • InChI=1S/CH3NO2.H3N/c2-1(3)4;/h2H2,(H,3,4);1H3
  • [O-]C(=O)N.[NH4+]
Properties
[NH4]NH2CO2
Molar mass 78.071 g·mol−1
Appearance Colorless, rhombic crystals
Density 1.38 g/cm3 (20 °C)
Melting point 60 °C (140 °F; 333 K) decomposes
Freely soluble in water
Solubility Soluble in ethanol, methanol, liquid ammonia, formamide[2][3]
log P −0.47 in octanol/water
Vapor pressure 492 mmHg(51 °C)
Thermochemistry
-642.5 kJ/mol
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Harmful if ingested, harmful to aquatic life, harmful if inhaled, respiatory tract irritation, skin irritation, eye irritation
GHS labelling:
GHS07: Exclamation mark
Warning
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 1: Exposure would cause irritation but only minor residual injury. E.g. turpentineFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
1
0
0
Flash point 105.6 °C (222.1 °F; 378.8 K)
Lethal dose or concentration (LD, LC):
1,470 mg/kg in a rat
Safety data sheet (SDS) External MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Ammonium carbamate is a chemical compound with the formula [NH4][H2NCO2] consisting of ammonium cation NH+4 and carbamate anion NH2COO−. It is a white solid that is extremely soluble in water, less so in alcohol. Ammonium carbamate can be formed by the reaction of ammonia NH3 with carbon dioxide CO2, and will slowly decompose to those gases at ordinary temperatures and pressures. It is an intermediate in the industrial synthesis of urea (NH2)2CO, an important fertilizer.[4]

  1. ^ "Ammonium Carbamate" Retrieved October 12, 2012.
  2. ^ Cite error: The named reference thor1935 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference kuss1935 was invoked but never defined (see the help page).
  4. ^ Jäger, Peter; Rentzea, Costin N.; Kieczka, Heinz (2000). "Carbamates and Carbamoyl Chlorides". ULLMANN'S Encyclopedia of Industrial Chemistry. doi:10.1002/14356007.a05_051. ISBN 3527306730.