Diethanolamine, or DEA, is a colorless liquid with an ammoniacal odor. It is a diol and a secondary amine, soluble in water, and even hygroscopic.

Monoethanolamine is an organic chemical compound and a primary amine.

Triethanolamine is also known by the name trolamine. It is an organic chemical compound that is a tertiary amine and a triol.