[{"from": "human", "value": "Please give me some details about this molecule. [C][Branch1][=Branch1][C][O][C][C][O][O]"}, {"from": "gpt", "value": "The molecule appears as a colorless liquid. Denser than water. Contact may slightly irritate skin, eyes and mucous membranes. May be slightly toxic by ingestion. Used to make other chemicals."}]