Widely used as a chelating agent in analytical chemistry, particularly for the extraction and pre-concentration of metal ions such as copper, nickel, zinc, and cobalt from aqueous samples. It forms stable, water-insoluble complexes with these metals, making it valuable in solvent extraction and spectrophotometric analysis. Commonly applied in environmental testing to determine trace metal contamination in water, soil, and biological samples. Also utilized in some industrial processes for metal removal or purification. Its solution form allows for easy handling and precise dosing in laboratory procedures.