Used primarily as an intermediate in the synthesis of dyes and pigments, particularly in the production of acid dyes for textiles. It is also employed in the manufacturing of pharmaceuticals, where it serves as a reagent or building block for active ingredients. In the chemical industry, it acts as a catalyst or stabilizer in certain reactions. Additionally, it finds application in the production of surfactants and detergents, enhancing their cleaning properties. Its sulfonic acid group makes it useful in ion exchange processes and as a corrosion inhibitor in industrial settings.