Used primarily as an intermediate in the synthesis of dyes and pigments, particularly for coloring textiles, paper, and leather. It plays a key role in producing azo dyes, which are known for their vibrant and durable colors. Additionally, it is utilized in the manufacturing of certain polymers and resins, contributing to their structural properties. In analytical chemistry, it serves as a reagent for detecting specific ions or compounds due to its reactivity. Its applications also extend to the production of specialty chemicals used in various industrial processes.