Used in the synthesis of organic compounds, particularly in the production of dyes and pigments, where it acts as a key intermediate. It is also employed in the manufacturing of liquid crystals, which are essential components in display technologies like LCD screens. Additionally, it serves as a catalyst or reagent in various chemical reactions, facilitating the formation of complex molecules. Its sulfonic acid groups make it useful in ion-exchange resins, which are applied in water purification and chemical separation processes. In research, it is utilized for studying molecular interactions and developing new materials with specific properties.