Used as a precursor in the production of europium-doped phosphors for cathode ray tubes, LED displays, and fluorescent lamps. Plays a key role in manufacturing red-emitting materials due to its strong luminescent properties under UV or electron beam excitation. Employed in research and development of luminescent inks, security tags, and anti-counterfeiting materials for banknotes and documents. Also utilized in the synthesis of europium oxide and other europium-containing compounds for optical and electronic applications.