Diethylenetriamine (abbreviated Dien or DETA) and also known as 2,2’-Iminodi(ethylamine)[2]) is an organic compound with the formula HN(CH2CH2NH2)2.

This colourless hygroscopic liquid is soluble in water and polar organic solvents, but not simple hydrocarbons.

In coordination chemistry, it serves as a tridentate ligand forming complexes such as Co(dien)(NO2)3.

Like ethylenediamine, DETA can also be used to sensitize nitromethane, making a liquid explosive compound similar to PLX.

DETA has been evaluated for use in the Countermine System under development by the U.S. Office of Naval Research, where it would be used to ignite and consume the explosive fill of land mines in beach and surf zones.