Widely used as an intermediate in the synthesis of azo dyes, it plays a crucial role in producing vibrant and colorfast dyes for textiles, paper, and leather industries. Its sulfonic acid group enhances water solubility, making it suitable for dye formulations. Additionally, it serves as a reagent in analytical chemistry for detecting and quantifying various metal ions due to its chelating properties. In the pharmaceutical sector, it is utilized in the preparation of certain active compounds and intermediates. Its versatility also extends to the production of organic pigments and as a component in photographic developers.