Methylamine
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| Names | |||
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| Pronunciation | /ˌmɛθələˈmiːn/ (METH-ə-lə-MEEN), /ˌmɛθəˈlæmən/ (METH-ə-LA-mən), /məˈθɪləˌmiːn/ (mə-THIL-ə-meen)[2] | ||
| Preferred IUPAC name
Methanamine[1] | |||
Other names
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| Identifiers | |||
CAS Number
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3D model (JSmol)
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| Abbreviations | MMA | ||
Beilstein Reference
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741851 | ||
| ChEBI | |||
| ChEMBL | |||
| ChemSpider | |||
| DrugBank | |||
| ECHA InfoCard | 100.000.746 | ||
| EC Number |
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Gmelin Reference
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145 | ||
| KEGG | |||
| MeSH | methylamine | ||
PubChem CID
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| RTECS number |
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| UNII | |||
| UN number | 1061 | ||
CompTox Dashboard (EPA)
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InChI
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SMILES
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| Properties | |||
Chemical formula
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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 | ||
Solubility in water
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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)
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−27.0·10−6 cm3/mol | ||
| Viscosity | 230 μPa·s (at 0 °C) | ||
Dipole moment
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1.31 D | ||
| Thermochemistry | |||
Std enthalpy of
formation (ΔfH⦵298) |
−23.5 kJ/mol | ||
| Hazards | |||
| GHS labelling: | |||
Pictograms
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Signal word
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Danger | ||
Hazard statements
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H220, H315, H318, H332, H335 | ||
Precautionary statements
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P210, P261, P280, P305+P351+P338, P410+P403 | ||
| NFPA 704 (fire diamond) | |||
| Flash point | −10 °C; 14 °F; 263 K (liquid, gas is extremely flammable)[3] | ||
Autoignition
temperature |
430 °C (806 °F; 703 K) | ||
| Explosive limits | 4.9–20.7% | ||
| Lethal dose or concentration (LD, LC): | |||
LD50 (median dose)
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100 mg/kg (oral, rat) | ||
LC50 (median concentration)
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1860 ppm (mouse, 2 hr)[3] | ||
| NIOSH (US health exposure limits): | |||
PEL (Permissible)
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TWA 10 ppm (12 mg/m3)[3] | ||
REL (Recommended)
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TWA 10 ppm (12 mg/m3)[3] | ||
IDLH (Immediate danger)
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100 ppm[3] | ||
| Safety data sheet (SDS) | emdchemicals.com | ||
| Related compounds | |||
Related alkanamines
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ethylamine, dimethylamine, trimethylamine | ||
Related compounds
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ammonia | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
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Methylamine, also known as methanamine, 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.
- ^ 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.
- ^ "Methylamine Definition & Meaning". Retrieved 22 April 2022.
- ^ a b c d e NIOSH Pocket Guide to Chemical Hazards. "#0398". National Institute for Occupational Safety and Health (NIOSH).