Used as a key intermediate in the synthesis of various organic compounds, particularly in the production of dyes, pigments, and pharmaceuticals. It plays a role in the formation of sulfonamide derivatives, which are essential in antibacterial drugs. Additionally, it is utilized in the manufacturing of surfactants and detergents due to its sulfonic acid group, which enhances water solubility and cleaning efficiency. In industrial processes, it serves as a catalyst or reagent in organic reactions, including polymerization and esterification. Its application extends to the preparation of specialty chemicals used in agrochemicals and coatings.