Used as a key intermediate in the synthesis of pharmaceuticals and agrochemicals, particularly in the development of bioactive molecules containing thiophene moieties. Its sulfonyl chloride group readily reacts with nucleophiles like amines and alcohols, enabling the formation of sulfonamides and sulfonate esters—common structural elements in drug design. It is also employed in materials science for constructing conjugated systems in organic semiconductors and functional polymers. The bromine substituent allows further functionalization via cross-coupling reactions such as Suzuki or Heck couplings, making it valuable in building complex organic architectures.