Used primarily in the dye industry as an intermediate for producing azo dyes, which are widely applied in textiles, leather, and paper coloring. It is also employed in the synthesis of pigments and other colorants due to its ability to form stable and vibrant hues. Additionally, it finds application in chemical research as a building block for developing more complex organic compounds. Its sulfonic acid group enhances solubility, making it suitable for aqueous-based processes in industrial applications.