Description: Triethylamine is a tertiary amine that is ammonia in which each hydrogen atom is substituted by an ethyl group. from ChEBI. TRIETHYLAMINE appears as a clear colorless liquid with a strong ammonia to fish-like odor. Flash point 20°F. Vapors irritate the eyes and mucous membranes. Triethylamine is mainly used in the production of quaternary ammonium compounds for textile auxiliaries and quaternary ammonium salts of dyes. It is also a catalyst and acid neutralizer for condensation reactions and is useful as an intermediate for manufacturing medicines, pesticides and other chemicals.