Used as an intermediate in the synthesis of nonsteroidal anti-inflammatory drugs (NSAIDs), particularly in the production of profen-class pharmaceuticals. Its functional groups allow for sulfonamide or sulfonate ester formation, enabling linkage to active drug molecules. Commonly employed in medicinal chemistry for constructing biologically active compounds with anti-inflammatory, analgesic, and antipyretic properties. Also utilized in the development of agrochemicals and specialty polymers due to its reactivity and aromatic backbone.