Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of sulfonamide-based drugs with antimicrobial and anti-inflammatory properties. It serves as a building block in organic synthesis, enabling the introduction of the 4-bromophenylsulfonyl group to modulate the biological activity of drug candidates. Also employed in the preparation of dyes and functional materials where bromine acts as a site for further coupling reactions, such as in Suzuki or Ullmann reactions. Its sulfonamide group allows for hydrogen bonding, useful in crystal engineering and supramolecular chemistry.