[{"from": "human", "value": "Please give me some details about this molecule. [C][C][=O]"}, {"from": "gpt", "value": "The molecule appears as a clear colorless liquid with a pungent choking odor. Flash point -36 \u00b0F. Boiling point 69 \u00b0F. Density 6.5 lb / gal. Vapors are heaver than air and irritate the mucous membranes and especially the eyes. Used to make other chemicals."}]