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Topic summary

Trimethylamine

Trimethylamine
Names Preferred IUPAC name
N,N-Dimethylmethanamine
Other names
(Trimethyl)amine (The name trimethylamine is deprecated.)
Identifiers
3D model (JSmol)
Abbreviations TMA
Me3N 956566 ChEBI
ChEMBL
ChemSpider
ECHA InfoCard100.000.796EC Number
  • 200-875-0
KEGG
RTECS number
  • PA0350000
UNII
UN number1083
  • InChI=1S/C3H9N/c1-4(2)3/h1-3H3
    Key: GETQZCLCWQTVFV-UHFFFAOYSA-N
  • CN(C)C
Properties C3H9NMolar mass59.112 g·mol Appearance Colorless gas OdorFishy, ammoniacal Density670 kg m (at 0 °C)
627.0 kg m (at 25 °C) Melting point−117.20 °C; −178.96 °F; 155.95 K Boiling point3 to 7 °C; 37 to 44 °F; 276 to 280 K Miscible log P0.119 Vapor pressure188.7 kPa (at 20 °C) 95 μmol Pa kg Basicity (pKb) 4.19 0.612 DThermochemistry −24.5 to −23.0 kJ mol Hazards GHS labelling: DangerH220, H315, H318, H332, H335P210, P261, P280, P305+P351+P338NFPA 704 (fire diamond)
2
4
0
Flash point−7 °C (19 °F; 266 K) 190 °C (374 °F; 463 K) Explosive limits2–11.6% Lethal dose or concentration (LD, LC): 500 mg kg (oral, rat)NIOSH (US health exposure limits):
PEL (Permissible)
none
REL (Recommended)
TWA 10 ppm (24 mg/m) ST 15 ppm (36 mg/m)
IDLH (Immediate danger)
N.D. Related compounds
Related amines
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Trimethylamine (TMA) is an organic compound with the formula N(CH3)3. It is a trimethylated derivative of ammonia. TMA is widely used in industry. At higher concentrations it has an ammonia-like odor, and can cause necrosis of mucous membranes on contact. At lower concentrations, it has a "fishy" odor, the odor associated with rotting fish.

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