Samarium(III) Ionophore I is primarily used in the development of ion-selective electrodes (ISEs) for detecting and measuring samarium ions (Sm³⁺) in various solutions. Its high selectivity for samarium makes it valuable in analytical chemistry for monitoring samarium concentrations in environmental samples, industrial processes, and research applications. Additionally, it is employed in sensor technologies for studying the behavior of rare earth elements in biological and chemical systems. Its ability to selectively bind samarium ions also aids in the separation and purification of samarium from mixtures containing other rare earth elements, which is crucial in materials science and electronics manufacturing.