Used primarily as a key intermediate in organic synthesis, especially in pharmaceutical and agrochemical industries. Its sulfonyl chloride group readily reacts with amines and alcohols, making it valuable for constructing sulfonamides and sulfonate esters—common motifs in bioactive molecules. It is also employed in the preparation of functionalized aromatic compounds where the bromine atoms allow further modification via cross-coupling reactions such as Suzuki or Heck reactions. Due to its reactivity and structural features, it serves in the development of specialty chemicals, including dyes, catalysts, and polymer modifiers.