[{"from": "human", "value": "Provide a description of this molecule. [N][=Branch1][C][=O][O-1].[N][=Branch1][C][=O][O-1].[Ni+2]"}, {"from": "gpt", "value": "The molecule appears as a crystalline solid or the solid dissolved in a liquid. Denser than water. Contact may irritate skin, eyes and mucous membranes. May be toxic by ingestion. Noncombustible, but accelerates the burning of combustible materials. Used to make other chemicals."}]