Used primarily as an intermediate in the synthesis of dyes, pigments, and other organic compounds. It serves as a sulfonating agent in various chemical reactions, enabling the introduction of sulfonic acid groups into organic molecules. This chemical is also employed in the production of surfactants and detergents due to its ability to enhance solubility and emulsification properties. Additionally, it finds application in the formulation of certain industrial cleaners and as a catalyst or additive in specific chemical processes. Its role in the manufacture of specialty chemicals and polymers is notable, particularly in creating materials with improved performance characteristics.