Ethyl 3-bromopropionate is the organobromine compound with the formula BrCHCHCOCH.  It is a colorless liquid and an alkylating agent.  It is prepared by the esterification of 3-bromopropionic acid.  Alternatively, it can be prepared by hydrobromination of ethyl acrylate, a reaction that proceeds in an anti-Markovnikov sense.