Methylamine

Not to be confused with Methenamine.

Methylamine

Skeletal formula of methylamine with all explicit hydrogens added
Ball and stick model of methylamine Spacefill model of methylamine
Names
Pronunciation	/ˌmɛθələˈmiːn/ (METH-ə-lə-MEEN), /ˌmɛθəˈlæmən/ (METH-ə-LA-mən), /məˈθɪləˌmiːn/ (mə-THIL-ə-meen)
Preferred IUPAC name Methanamine
Other names Aminomethane Monomethylamine
Identifiers
CAS Number	74-89-5 Y
3D model (JSmol)	Interactive image
Abbreviations	MMA MeNH2
Beilstein Reference	741851
ChEBI	CHEBI:16830 N
ChEMBL	ChEMBL43280 Y
ChemSpider	6089 Y
DrugBank	DB01828 N
ECHA InfoCard	100.000.746
EC Number	200-820-0
Gmelin Reference	145
KEGG	C00218 Y
MeSH	methylamine
PubChem CID	6329
RTECS number	PF6300000
UNII	BSF23SJ79E Y
UN number	1061
CompTox Dashboard (EPA)	DTXSID7025683
InChI InChI=1S/CH5N/c1-2/h2H2,1H3 Y Key: BAVYZALUXZFZLV-UHFFFAOYSA-N Y
SMILES CN
Properties
Chemical formula	CH5N
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
Solubility in water	1008 g/L (at 20 °C)
log P	−0.472
Vapor pressure	186.10 kPa (at 20 °C)
Henry's law constant (kH)	1.4 mmol/(Pa·kg)
Acidity (pKa)	10.66
Conjugate acid	[CH3NH3]+ (Methylammonium)
Magnetic susceptibility (χ)	−27.0·10−6 cm3/mol
Viscosity	230 μPa·s (at 0 °C)
Dipole moment	1.31 D
Thermochemistry
Std enthalpy of formation (ΔfH⦵298)	−23.5 kJ/mol
Hazards
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H220, H315, H318, H332, H335
Precautionary statements	P210, P261, P280, P305+P351+P338, P410+P403
NFPA 704 (fire diamond)	3 4 0
Flash point	−10 °C; 14 °F; 263 K (liquid, gas is extremely flammable)
Autoignition temperature	430 °C (806 °F; 703 K)
Explosive limits	4.9–20.7%
Lethal dose or concentration (LD, LC):
LD50 (median dose)	100 mg/kg (oral, rat)
LC50 (median concentration)	1860 ppm (mouse, 2 hr)
NIOSH (US health exposure limits):
PEL (Permissible)	TWA 10 ppm (12 mg/m3)
REL (Recommended)	TWA 10 ppm (12 mg/m3)
IDLH (Immediate danger)	100 ppm
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). N verify (what is YN ?) Infobox references

Methylamine, also known as methanamine, is an organic compound with a formula of CH₅N or 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 dissolved in solution with 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.