Used primarily as a key intermediate in the synthesis of pharmaceuticals and agrochemicals. Its sulfonyl chloride group readily reacts with amines and alcohols, making it valuable for constructing sulfonamide and sulfonate ester derivatives. Commonly employed in the development of herbicides and fungicides due to the enhanced bioactivity imparted by the sulfonyl moiety. Also utilized in medicinal chemistry for the preparation of kinase inhibitors and other biologically active molecules where the bromo and sulfonyl functionalities allow for further structural modifications through cross-coupling reactions or nucleophilic substitutions.