[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][=Branch1][C][=C][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule appears as a clear colorless liquid with a pungent odor. Corrosive to metals and tissue. Combustible. Flash point 170 \u00b0F. Melting point 61 \u00b0F. May polymerize if contaminated or heated. If polymerization takes place inside a closed container, the container may violently rupture. Less dense than water and is soluble in water. Vapors heavier than air. Used to make plastics."}]