Europium chloride is an inorganic compound with the chemical formula EuCl3. It is a typical metal halide with a high degree of water solubility. In its pure state, Europium chloride is a white solid, but because it easily absorbs water and forms hydrates, it is usually present in the form of hydrates, such as EuCl3·6H2O.

Europium chloride is mainly used in scientific research, especially as an important compound of rare earth elements, and has a wide range of applications in materials science, catalysts, luminescent materials and other fields. The use of europium's compounds in fluorescent materials is particularly compelling, as europium's luminescent properties are so unique that it can produce a vivid red light, which has important applications in areas such as plasma displays, fluorescent lamps, and lasers.