Used as a chelating ligand in coordination chemistry, particularly in the development of metal-ion sensors due to its strong binding affinity for transition metals like copper, iron, and zinc. Its phenolic groups enhance solubility in polar solvents and allow for pH-responsive behavior, making it suitable for designing fluorescent probes and redox-active materials. Also employed in catalysis and in the construction of metallo-supramolecular assemblies for molecular devices.