Methylamine

Methylamine
Skeletal formula of methylamine with all explicit hydrogens added
Ball and stick model of methylamine
Ball and stick model of methylamine
Spacefill model of methylamine
Spacefill model of methylamine
Names
Pronunciation /ˌmɛθələˈmiːn/
(METH-ə-lə-MEEN), /ˌmɛθəˈlæmən/
(METH-ə-LA-mən), /məˈθɪləˌmiːn/
(mə-THIL-ə-meen)[2]
Preferred IUPAC name
Methanamine[1]
Other names
  • Aminomethane
  • Monomethylamine
Identifiers
3D model (JSmol)
3DMet
Abbreviations MMA
741851
ChEBI
ChEMBL
ChemSpider
DrugBank
ECHA InfoCard 100.000.746 Edit this at Wikidata
EC Number
  • 200-820-0
145
KEGG
MeSH methylamine
RTECS number
  • PF6300000
UNII
UN number 1061
  • InChI=1S/CH5N/c1-2/h2H2,1H3 checkY
    Key: BAVYZALUXZFZLV-UHFFFAOYSA-N checkY
  • CN
Properties
CH3NH2
Molar mass 31.058 g·mol−1
Appearance Colorless gas
Odor Fishy, ammoniacal
Density 0.6562 g/cm3 (at 25 °C)
Melting point −93.10 °C; −135.58 °F; 180.05 K
Boiling point −6.6 to −6.0 °C; 20.0 to 21.1 °F; 266.5 to 267.1 K
1008 g/L (at 20 °C)
log P −0.472
Vapor pressure 186.10 kPa (at 20 °C)
1.4 mmol/(Pa·kg)
Acidity (pKa) 10.66
Conjugate acid [CH3NH3]+ (Methylammonium)
-27.0·10−6 cm3/mol
Viscosity 230 μPa·s (at 0 °C)
1.31 D
Thermochemistry
−23.5 kJ/mol
Hazards
GHS labelling:
GHS02: Flammable GHS05: Corrosive GHS07: Exclamation mark
Danger
H220, H315, H318, H332, H335
P210, P261, P280, P305+P351+P338, P410+P403
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 4: Will rapidly or completely vaporize at normal atmospheric pressure and temperature, or is readily dispersed in air and will burn readily. Flash point below 23 °C (73 °F). E.g. propaneInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
3
4
0
Flash point −10 °C; 14 °F; 263 K (liquid, gas is extremely flammable)[3]
430 °C (806 °F; 703 K)
Explosive limits 4.9–20.7%
Lethal dose or concentration (LD, LC):
100 mg/kg (oral, rat)
1860 ppm (mouse, 2 hr)[3]
NIOSH (US health exposure limits):
PEL (Permissible)
 TWA 10 ppm (12 mg/m3)[3]
REL (Recommended)
 TWA 10 ppm (12 mg/m3)[3]
IDLH (Immediate danger)
 100 ppm[3]
Safety data sheet (SDS) emdchemicals.com
Related compounds
Related alkanamines
 ethylamine, dimethylamine, trimethylamine
Related compounds
 ammonia
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Methylamine is an organic compound with a formula of CH3NH2. This colorless gas is a derivative of ammonia, but with one hydrogen atom being replaced by a methyl group. It is the simplest primary amine.

Methylamine is sold as a solution in methanol, ethanol, tetrahydrofuran, or water, or as the anhydrous gas in pressurized metal containers. Industrially, methylamine is transported in its anhydrous form in pressurized railcars and tank trailers. It has a strong odor similar to rotten fish. Methylamine is used as a building block for the synthesis of numerous other commercially available compounds.

  1. ^ Nomenclature of Organic Chemistry: IUPAC Recommendations and Preferred Names 2013 (Blue Book). Cambridge: The Royal Society of Chemistry. 2014. p. 670. doi:10.1039/9781849733069-00648. ISBN 978-0-85404-182-4.
  2. ^ "Methylamine Definition & Meaning". Retrieved 22 April 2022.
  3. ^ a b c d e NIOSH Pocket Guide to Chemical Hazards. "#0398". National Institute for Occupational Safety and Health (NIOSH).