Used primarily as an intermediate in the synthesis of azo dyes, this compound plays a crucial role in producing vibrant and stable colors for textiles, inks, and pigments. Its sulfonic acid group enhances water solubility, making it suitable for dyeing processes in aqueous solutions. Additionally, it is employed in the preparation of certain pharmaceuticals and organic compounds, where its functional groups facilitate specific chemical reactions. In analytical chemistry, it serves as a reagent for detecting and quantifying various substances due to its ability to form colored complexes. Its versatility in both industrial and laboratory settings underscores its importance in chemical synthesis and applications.