Triethylindium is an organometallic compound. Its chemical formula is .
This compound can be obtained by reacting indium(III) bromide with a diethyl ether solution of ethylmagnesium bromide:
Other routes are also known.
Indium triethyl is a colorless, toxic, oxidation and hydrolysis-sensitive liquid. It is a monomer in the gaseous and dissolved state. The compound reacts with halomethanes to form diethyl indium halides.
Triethylindium reacts violently with water:
Indium triethyl is used to prepare indium phosphide layers for microelectronics.