Used primarily in the dye and pigment industry, it serves as a key intermediate in the synthesis of azo dyes, which are widely applied in textiles, leather, and paper coloring. Its sulfonic acid groups enhance water solubility, making it suitable for dyeing processes that require bright and durable colors. Additionally, it is utilized in the production of optical brighteners and certain specialty chemicals. Its role in creating high-performance dyes ensures its importance in industrial applications requiring colorfastness and stability.