Californium oxychloride (CfOCl) is a radioactive salt first discovered in measurable quantities in 1960.

It is composed of a single californium cation and oxychloride consisting of one chloride and one oxide anion.

It was the first californium compound ever isolated.

[1] Treatment of Cf2O3 with moist hydrogen chloride or CfCl3 with water vapor.

[2] The compound form pale green crystals.