Freshly distilled triethylamine
Structure of triethylamine
| Preferred IUPAC name
| Other names
|Molar mass||101.19 g/mol|
|Melting point||−114.7 °C (−174.5 °F; 158.5 K)|
|Boiling point||88.8 °C (191.8 °F; 361.9 K)|
| Miscible (<18.7 °C)|
5.5 g/100 ml (20 °C)
6.86 g/100 ml (25 °C)
|Solubility|| Miscible with acetone, diethyl ether, ethanol|
Soluble in benzene, carbon tetrachloride, chloroform, mineral and natural oils
|Vapor pressure||6.899–8.506 kPa|
Std enthalpy of
|Safety data sheet||Sigma-Aldrich|
|Flash point||−15 °C (5 °F; 258 K)|
|Lethal dose or concentration (LD, LC):|
LD50 (Median dose)
| 580 mg/kg (rabbit, dermal)|
730 mg/kg (rat, oral)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Triethylamine is a colorless liquid with a melting point of -114.7 °C and a boiling point around 88.6 °C. It has a strong, fishy odor reminiscent of ammonia.
Triethylamine is a base commonly used in organic chemistry to prepare esters and amides from acyl chlorides. Like other tertiary amines,it catalyzes the formation of urethane foams and epoxy resins.
It is sold by chemical suppliers.
There are many ways to make triethylamine, though only a few are efficient.
THIS SIMPLIFIED OUTLINE STILL NEEDS IMPROVEMENT. FOR A FULL PROCEDURE,SEE THE LINKED REFERENCE.
Triethylamine can be prepared by heating ethyl bromide and anhydrous ammonia in absolute ethanol in an oven for three hours, removing the product, distilling off the alcohol, and adding hydrochloric acid to the product to convert it to its hydrochloride salt. Melt the triethylamine hydrochloride and filter off the ammonium chloride crystals that remain. After filtering, freebase the triethylamine and once again add ethyl bromide. Heat in a steam oven for three hours and allow it to slowly cool. Remove the resulting liquid.
- Quaternary ammonium compounds
- Anesthetize mosquitoes
Safety and toxicity
Triethylamine is a toxic liquid.
Triethylamine should be stored in a special cabinet, away from any heat source.
Triethylamine can be diluted with a flammable solvent and burned in an open place.
Adding an acid will convert it to salt, which is easier to dispose of.