Used as an intermediate in organic synthesis, particularly in the preparation of sulfonamide-based pharmaceuticals and agrochemicals. Its dual functionality—bromine and chloromethyl sulfonyl groups—allows sequential substitution reactions, enabling the construction of complex molecules. Commonly employed in cross-coupling reactions such as Suzuki or Heck reactions via the bromo moiety, while the chloromethyl group can be displaced to introduce additional functional groups. Valuable in medicinal chemistry for building blocks in drug discovery and in the development of functionalized aromatic compounds for materials science.