Primarily used in the synthesis of dyes and pigments, this compound serves as an intermediate in the production of various colorants, particularly azo dyes. It is also employed in the manufacturing of optical brighteners, which enhance the whiteness and brightness of textiles and paper products. Additionally, it finds application in the preparation of certain pharmaceuticals and agrochemicals, where it acts as a key building block in complex chemical reactions. Its sulfonic acid group makes it useful in creating water-soluble derivatives, which are essential in industries requiring compounds with high solubility in aqueous solutions.