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 bioactive molecules, including kinase inhibitors and antitumor agents. Also utilized in the preparation of functionalized aromatic compounds for use in medicinal chemistry research and drug discovery. Its halogen substituents allow for further functionalization via cross-coupling reactions, enhancing its versatility in complex molecule synthesis.