Used primarily in the dye industry, it serves as an intermediate for synthesizing azo dyes, which are widely applied in textiles, leather, and paper coloring. Its sulfonic acid group enhances water solubility, making it suitable for dyeing processes. Additionally, it is utilized in the production of fluorescent brighteners and organic pigments. In research, it acts as a reagent for studying biochemical processes and developing analytical methods. Its properties also make it valuable in creating specialty chemicals for industrial applications.