Primarily used in the dye industry, it serves as an intermediate for synthesizing azo dyes, which are essential for coloring textiles, leather, and paper. Its sulfonic acid group enhances water solubility, making it suitable for dye formulations. Additionally, it is utilized in the production of pigments and inks, contributing to vibrant and stable colorants. In research, it acts as a reagent for studying chemical reactions and developing new organic compounds. Its applications also extend to the manufacturing of fluorescent brighteners and pharmaceutical intermediates, highlighting its versatility in industrial chemistry.