Used as a chelating agent in analytical chemistry for the selective binding and detection of metal ions, particularly in spectroscopic and electrochemical sensors. Its macrocyclic structure enables high stability with transition metals, making it suitable for applications in environmental monitoring and industrial process control. Also employed in the design of ion-selective membranes and electrodes due to its ability to enhance selectivity and sensitivity. Additionally, it finds use in separation techniques for metal ion recovery and purification in hydrometallurgy.