Californium(III) chloride is an inorganic compound with a chemical formula CfCl<sub>3</sub>. As in californium(III) oxide (Cf<sub>2</sub>O<sub>3</sub>) and other californium halides, including californium(III) fluoride (CfF<sub>3</sub>) and iodide (CfI<sub>3</sub>), the californium atom has an oxidation state of +3.
Californium(III) chloride can prepared by reacting californium(III) oxide with hydrogen chloride.
When heating californium(III) chloride until 500 ðC, it can hydrolyse to produce californium oxychloride.
Californium(III) chloride is soluble in water, giving Cf<sup>3+</sup> and Cl<sup>âÂÂ</sup> ions. This salt has an emerald-green color. Its crystal structure is hexagonal. It is strongly radioactive.