Diethylethanolamine (DEAE) is the organic compound with the molecular formula (C2H5)2NCH2CH2OH.

A colorless liquid, is used as a precursor in the production of a variety of chemical commodities such as the local anesthetic procaine.

Diethylethanolamine is used as a corrosion inhibitor in steam and condensate lines by neutralizing carbonic acid and scavenging oxygen.

DEAE is a precursor for DEAE-cellulose resin, which is commonly used in ion exchange chromatography.

Diethylethanolamine is prepared commercially by the reaction of diethylamine and ethylene oxide.