Used as a selective ionophore in ion-selective electrodes, particularly for potassium ion detection due to its high binding affinity for K⁺ in aqueous solutions. Commonly applied in analytical chemistry for sensing and monitoring potassium in biological and environmental samples. Also employed in supramolecular chemistry to facilitate cation transport across membranes and in the design of sensors and extraction agents. Its structure enables complexation with ammonium and alkali metal ions, making it useful in catalysis and separation processes.