Widely used as a chelating agent in analytical chemistry, particularly for the extraction and pre-concentration of trace metal ions such as copper, nickel, zinc, and cobalt from various samples. Its ability to form stable, water-insoluble complexes with heavy metals makes it valuable in spectrometric analysis, improving detection sensitivity. Commonly applied in environmental testing to determine metal contamination in water, soil, and biological samples. Also utilized in some industrial processes for metal removal or purification, and occasionally in polymer manufacturing as a stabilizer or catalyst precursor. Its role in separation techniques like solvent extraction and solid-phase extraction enhances accuracy in metal quantification.