(R, R' = alkyl, aryl): Like other tertiary amines, it catalyzes the formation of urethane foams and epoxy resins.

It is also a catalyst and acid neutralizer for condensation reactions and is useful as an intermediate for manufacturing medicines, pesticides and other chemicals.

[citation needed] Triethylamine is the active ingredient in FlyNap, a product for anesthetizing fruit flies.

[16] The Soviet Scud missile used TG-02, a mixture of 50% xylidine and 50% triethylamine as a starting fluid to ignite its rocket engine.

[17][better source needed] Hawthorn flowers have a heavy, complicated scent, the distinctive part of which is triethylamine, which is also one of the first chemicals produced by a dead human body when it begins to decay.

Due to the scent, it is considered unlucky in British culture to bring hawthorn into a house.