Bromoethane, also known as ethyl bromide, is a chemical compound of the haloalkanes group. It is abbreviated by chemists as EtBr (which is also used as an abbreviation for ethidium bromide). This volatile compound has an ether-like odour. It is used in organic synthesis, EtBr is the synthetic equivalent of the ethyl carbocation (Et+) synthon. In reality, such a cation is not actually formed. For example, carboxylates salts are converted into ethyl esters, carbanions into ethylated derivatives, thiourea into ethylisothiouronium salts, and amines into ethylamines. Storage Information: Refrigerate. Keep tightly closed.