[{"from": "human", "value": "What can you tell me about this molecule? [O][As][=Branch1][C][=O][Branch1][C][O][O-1].[K+1]"}, {"from": "gpt", "value": "The molecule appears as a colorless crystalline solid. Soluble in water and denser than water. Toxic by ingestion and inhalation. An irritant."}]