Used as a key intermediate in the synthesis of organic compounds, particularly in the production of dyes and pigments. It plays a role in creating sulfonated polymers, which are essential in water treatment processes due to their ion-exchange properties. Additionally, it is utilized in the development of advanced materials for fuel cells, where its sulfonic acid groups enhance proton conductivity. In pharmaceuticals, it serves as a building block for designing drug molecules with improved solubility and bioavailability.