Used as a precursor in the synthesis of terbium-containing materials for luminescent applications, particularly in organic light-emitting diodes (OLEDs) and fluorescent sensors. Its strong green emission under UV excitation makes it valuable in developing optical devices and bioimaging probes. Also employed in research for catalyst development and in doping matrices for laser materials. The hydrate form supports solubility in polar solvents, facilitating its use in solution-based processing techniques.