[{"from": "human", "value": "What can you tell me about this molecule? [C][C][O][C][=C]"}, {"from": "gpt", "value": "The molecule appears as a clear colorless low-boiling liquid (35-36 \u00b0C) with an ether-like odor. Flash point below -50 \u00b0F. May polymerize exothermically if heated or contaminated. If polymerization takes place inside a container, the container may rupture violently. Less dense than water and slightly soluble in water. Hence floats on water. Vapors are heavier than air."}]