Trimethylamine
A tertiary amine with a nitrogen lone pair but no N–H bond.
- Formula
- C3H9N
- Functional group
- Amines
- Molar mass
- 59.11 g/mol
- Also known as
- N,N-dimethylmethanamine, Methanamine, N,N-dimethyl-, N-Trimethylamine, Dimethylmethaneamine, (CH3)3N
Overview
A tertiary amine with a nitrogen lone pair but no N–H bond.
It can form trimethylammonium salts by protonation. Absence of an N–H bond prevents the usual primary- or secondary-amine acylation pathway to a neutral amide. Tertiary amine and quaternary ammonium describe different bonding and charge states.
Identifiers
- Formula
- C3H9N
- Functional group
- Amines
- Molar mass
- 59.11 g/mol
- Also known as
- N,N-dimethylmethanamine, Methanamine, N,N-dimethyl-, N-Trimethylamine, Dimethylmethaneamine, (CH3)3N
Chemical identifiers
- SMILES
- CN(C)C
- InChI
- InChI=1S/C3H9N/c1-4(2)3/h1-3H3
- PubChem CID
- 1146
Properties
- Melting Point
- -117.08 °C
- Boiling Point
- 2.87 °C at 760 mm Hg
- Relative density (water = 1)
- Relative density (water = 1): 0.6 (liquid)
- Water solubility
- In water, 8.9X10+5 mg/L at 30 °C
Related compounds
- Amines
A tertiary amine with a nitrogen lone pair but no N–H bond.
References
- PubChem Compound Summary: Trimethylamine (CID 1146)National Center for Biotechnology Information · PubChem
Identity, molecular formula, molecular weight and aliases retrieved via PUG REST on 2026-09-08.
- OpenStax Organic Chemistry: Structure and properties of aminesJohn McMurry · OpenStax · 2023
Supports the qualitative structure and reactivity context; identity and numerical measurements retain their original references.
- OpenStax Organic Chemistry: Reactions of aminesJohn McMurry · OpenStax · 2023
Supports the qualitative structure and reactivity context; identity and numerical measurements retain their original references.
- Hazardous Substances Data Bank (HSDB): Trimethylamine — melting pointHazardous Substances Data Bank (HSDB)
Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/1146#section=Melting-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: O'Neil, M.J. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Cambridge, UK: Royal Society of Chemistry, 2013., p. 1799
- Hazardous Substances Data Bank (HSDB): Trimethylamine — boiling pointHazardous Substances Data Bank (HSDB)
Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/1146#section=Boiling-Point. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: O'Neil, M.J. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Cambridge, UK: Royal Society of Chemistry, 2013., p. 1799
- ILO-WHO International Chemical Safety Cards (ICSCs): Trimethylamine — densityILO-WHO International Chemical Safety Cards (ICSCs)
Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/1146#section=Density. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred.
- Hazardous Substances Data Bank (HSDB): Trimethylamine — solubilityHazardous Substances Data Bank (HSDB)
Retrieved through PubChem PUG View on 2026-09-08. https://pubchem.ncbi.nlm.nih.gov/compound/1146#section=Solubility. Source value, complete property clause or compact miscibility statement retained; absent pressure, temperature or phase conditions are not inferred. Original reference: Kirk-Othmer Encyclopedia of Chemical Technology. 3rd ed., Volumes 1-26. New York, NY: John Wiley and Sons, 1978-1984., p. V2: 272 (1978)