Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of non-steroidal anti-inflammatory drugs (NSAIDs) and COX-2 inhibitors. Its sulfonyl chloride group readily reacts with amines and alcohols, making it valuable for constructing sulfonamide and sulfonate ester derivatives. Commonly employed in medicinal chemistry for building bioactive molecules with analgesic and antipyretic properties. Also utilized in agrochemical research for designing novel pesticides and herbicides due to its stable aromatic and heterocyclic framework.