[{"from": "human", "value": "Could you provide a description of this molecule? [Cl-1].[Cl-1].[57Co+2]"}, {"from": "gpt", "value": "The molecule is a radioactive salt of the metal cobalt. Cobalt chloride Co-57 is a radiopharmaceutical used in nuclear medicine as an imaging agent in the diagnosis of certain forms of cancer."}]