[{"from": "human", "value": "Please give me some details about this molecule. [C][C][=Branch1][C][=O][Cl]"}, {"from": "gpt", "value": "The molecule appears as a colorless, fuming liquid with a pungent odor. Density 9.2 lb / gal. Flash point 40 \u00b0F. Vapor, which is heavier than air, irritates the eyes and mucous membranes. Corrosive to metals and tissue."}]