Triethylindium  Triethylindium is an olorganic chemical compound from the group of organometallic compounds. Its chemical formula is . Indium triethyl can be obtained by reacting an ether solution of indium(III) chloride with ethyl magnesium chloride. Other syntheses 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 diethyl indium halides. Triethylindium is highly reactive with water:  In(C2H5)3 + → In(C2H5)2OH + ↑  Indium triethyl is used to prepare indium phosphide layers for semiconductors.