Used primarily as an intermediate in the synthesis of dyes and pigments, particularly for creating deep, stable colors in textiles and inks. It is also employed in the production of polyimide resins, which are essential in high-temperature-resistant coatings and adhesives. Additionally, it serves as a precursor in the development of corrosion inhibitors for metals, helping to extend the lifespan of industrial equipment. In analytical chemistry, it is utilized as a reagent for detecting trace amounts of certain metals due to its ability to form stable complexes.