Used as an efficient coupling agent in peptide synthesis, facilitating the formation of amide bonds by activating carboxylic acids. It is particularly effective in solid-phase peptide synthesis due to its stability and high reactivity. Also employed in the preparation of functionalized polymers and bioconjugates, where controlled esterification or amidation is required. Its bromo group allows further modification through nucleophilic substitution, making it useful in multi-step organic syntheses and drug development.