Used as an intermediate in the synthesis of dyes and pigments, particularly in the production of colorants for textiles and paper. It plays a role in creating vibrant and stable colors in these industries. Additionally, it is utilized in analytical chemistry as a reagent for detecting and quantifying metal ions due to its chelating properties. Its sulfonic acid group enhances solubility, making it suitable for aqueous-based applications. In pharmaceuticals, it serves as a building block for developing compounds with potential biological activity. Its versatility makes it valuable in both industrial and research settings.