2-Bromo-N,N,N-trimethylethanaminium bromide is a type of quaternary ammonium salt. It consists of the positively charged 2-bromo-N,N,N-trimethylethylammonium cation and the negatively charged bromide anion. This compound is commonly utilized as a phase transfer catalyst in organic chemical reactions, aiding in the transfer of reactants between immiscible phases. Additionally, it serves as a halogenating agent, for instance, in the bromination of alkenes.