Erbium perchlorate is primarily utilized in specialized chemical research and development, particularly in the field of materials science. It serves as a precursor in the synthesis of erbium-doped materials, which are essential for creating optical components such as lasers and amplifiers. These materials are critical in telecommunications for enhancing signal strength and clarity in fiber-optic networks. Additionally, erbium perchlorate is used in the production of phosphors, which are applied in display technologies and lighting systems to emit specific wavelengths of light. Its role in catalysis is also explored, particularly in reactions requiring precise control over erbium ion activity. In analytical chemistry, it is employed as a reagent for trace metal analysis due to its unique spectroscopic properties.