Used primarily in research and specialized materials science, this compound serves as a precursor for producing thulium oxide, which is employed in high-temperature superconductors and ceramic materials. It finds application in the synthesis of luminescent materials used in medical imaging and radiation detection due to thulium’s favorable emission properties under X-ray exposure. Additionally, it is utilized in the development of doped crystals for solid-state lasers operating in the near-infrared range. Its hydrate form aids in handling and processing during the fabrication of optical devices and phosphors. Limited commercial use exists outside advanced technological and laboratory settings.