Used primarily in the dye and pigment industry, it serves as an intermediate in the synthesis of azo dyes, which are widely applied in textiles, leather, and paper coloring. Its structure allows for the creation of vibrant and stable colors, making it valuable for producing dyes with excellent light and wash fastness. Additionally, it is utilized in the preparation of organic pigments for inks and coatings, contributing to their durability and performance. Its sulfonic acid group enhances water solubility, facilitating its use in aqueous dyeing processes.