Used as a reagent in peptide synthesis, particularly for modifying peptides and proteins to enhance their biological activity or stability. It is employed in the preparation of affinity labels for enzymes, aiding in the study of enzyme mechanisms and active sites. Additionally, it serves as a crosslinking agent in biochemical research to investigate protein-protein interactions. Its bromoacetyl group is reactive towards nucleophiles, making it useful for attaching functional groups to biomolecules in drug development and bioconjugation studies.