Dimethylamine
Dimethylamine is an organic compound with the formula (CH3)2NH. This secondary amine is a colorless, flammable gas with an ammonia-like odor. Dimethylamine is commonly encountered commercially as a solution in water at concentrations up to around 40%. An estimated 270,000 tons were produced in 2005.
| Names | |
|---|---|
| Preferred IUPAC name
N-Methylmethanamine | |
| Other names
(Dimethyl)amine | |
| Identifiers | |
3D model (JSmol) |
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| 3DMet | |
| 605257 | |
| ChEBI | |
| ChEMBL | |
| ChemSpider | |
| ECHA InfoCard | 100.004.272 |
| EC Number |
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| 849 | |
| KEGG | |
| MeSH | dimethylamine |
PubChem CID |
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| RTECS number |
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| UNII | |
| UN number | 1032 |
CompTox Dashboard (EPA) |
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SMILES
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| Properties | |
| (CH3)2NH | |
| Molar mass | 45.085 g·mol−1 |
| Appearance | Colorless gas |
| Odor | Fishy, ammoniacal |
| Density | 649.6 kg m−3 (at 25 °C) |
| Melting point | −93.00 °C; −135.40 °F; 180.15 K |
| Boiling point | 7 to 9 °C; 44 to 48 °F; 280 to 282 K |
| 1.540 kg L−1 | |
| log P | −0.362 |
| Vapor pressure | 170.3 kPa (at 20 °C) |
Henry's law constant (kH) |
310 μmol Pa−1 kg−1 |
| Basicity (pKb) | 3.29 |
| Thermochemistry | |
Std enthalpy of formation (ΔfH⦵298) |
−21 to −17 kJ mol−1 |
| Hazards | |
| GHS labelling: | |
| Danger | |
| H220, H302, H315, H318, H332, H335 | |
| P210, P261, P280, P305+P351+P338 | |
| NFPA 704 (fire diamond) |
2
4
0 |
| Flash point | −6 °C (21 °F; 267 K) (liquid) |
| 401 °C (754 °F; 674 K) | |
| Explosive limits | 2.8–14.4% |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose) |
698 mg/kg (rat, oral) 316 mg/kg (mouse, oral) 240 mg/kg (rabbit, oral) 240 mg/kg (guinea pig, oral) |
LC50 (median concentration) |
4700 ppm (rat, 4 hr) 4540 ppm (rat, 6 hr) 7650 ppm (mouse, 2 hr) |
| NIOSH (US health exposure limits): | |
PEL (Permissible) |
TWA 10 ppm (18 mg/m3) |
REL (Recommended) |
TWA 10 ppm (18 mg/m3) |
IDLH (Immediate danger) |
500 ppm |
| Related compounds | |
Related amines |
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Related compounds |
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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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