CAS Number: 75‑50‑3
Synonyms: Trimethylamine; N,N‑Dimethylmethanamine; TMA
Chemical Formula: C₃H₉N
Molecular Weight: 59.11 g/mol
Product Introduction
A colorless gas or refrigerated liquid with a sharp, fishy/ammoniacal odor. A tertiary aliphatic amine used in organic synthesis, analytical chemistry, catalysts, surfactants, and solvent systems.
| Property | Value |
|---|---|
| Appearance | Colorless gas or liquid (when compressed) |
| Odor | Strong fishy/ammoniacal |
| Density @ 25 °C | ~0.627 kg/L (gas), ~0.63 g/cm³ (liquid) |
| Melting Point | –117 °C |
| Boiling Point | ~3.5–4 °C (37 °F) |
| Vapor Pressure @ 20 °C | ~188.7 kPa (1,454 mm Hg) |
| Solubility in Water | Miscible |
| Log P | ~0.12 |
| Flash Point | –7 °C |
| NFPA Ratings | Health 2, Fire 4, Reactivity 0 |
Extremely flammable; corrosive; toxic (oral LD₅₀ ~500 mg/kg in rats) . GHS: H224, H302, H314, H335. Use under inert/N₂ atmosphere with full PPE, gas monitoring. Store compressed in cylinders with gas safety.
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