[{"from": "human", "value": "Generate a molecule based on this description. The molecule appears as a white crystalline noncombustible solid. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. It is used in medicine, in photography."}, {"from": "gpt", "value": "[Zn+2].[Br-1].[Br-1]"}]