Ethyl group

In organic chemistry, an ethyl group (abbreviated as ET, Et or et) is an alkylsubstituent with the formula−CH₂CH₃, derived from ethane (C₂H₆).

Ethyl is used in the International Union of Pure and Applied Chemistry's nomenclature of organic chemistry for a saturated two-carbon moiety in a molecule, while the prefix "eth-" is used to indicate the presence of two carbon atoms in the molecule.