Used primarily as an intermediate in the synthesis of dyes and pigments, particularly in the production of azo dyes, which are widely applied in textiles, leather, and paper industries. It also serves as a key component in the manufacturing of UV absorbers, enhancing the stability of polymers and coatings against sunlight degradation. Additionally, it finds application in the preparation of pharmaceuticals, where it acts as a building block for certain active ingredients. Its sulfonic acid group makes it useful in various chemical reactions, including sulfonation processes, contributing to its versatility in industrial applications.