Used as an intermediate in the synthesis of azo dyes and pigments, particularly for producing bright red and orange shades. Its sulfonic acid groups enhance water solubility, making it suitable for dyeing textiles, paper, and leather. Also employed in the formulation of functional dyes for inkjet printing due to good color fastness and stability. Additionally, it serves in the development of analytical reagents for metal ion detection, leveraging its chelating properties with certain cations.