Used primarily as a precursor in the synthesis of dyes and pigments, particularly for coloring textiles and plastics. It is also employed in the production of corrosion inhibitors, which protect metals from degradation in industrial environments. In analytical chemistry, it serves as a reagent for detecting trace amounts of metal ions due to its chelating properties. Additionally, it finds application in the manufacture of polyimide resins, which are utilized in high-performance materials for electronics and aerospace industries due to their thermal stability and mechanical strength.