Used primarily in the production of dyes and pigments, this compound acts as an intermediate in synthesizing azo dyes, which are widely applied in textiles, paper, and leather industries. It also serves as a coupling agent in dye manufacturing, enhancing color fastness and brightness. Additionally, it finds application in the preparation of optical brighteners and fluorescent whitening agents used in detergents and paper products. Its sulfonic acid group makes it soluble in water, facilitating its use in aqueous dyeing processes.