Used primarily as a derivatizing agent in organic synthesis, especially in the preparation of active esters and carbamates. It reacts readily with amines and alcohols to form phenylurethane or carbonate derivatives, making it valuable in peptide synthesis and pharmaceutical intermediates. Commonly employed in the modification of biomolecules for analytical purposes, such as enhancing detection in chromatography or mass spectrometry. Also utilized in the development of agrochemicals and specialty polymers due to its ability to introduce bromophenyl groups that can undergo further transformations like cross-coupling reactions.