[{"from": "human", "value": "Describe this molecule. [C][C][=Branch1][C][=C][C][Cl]"}, {"from": "gpt", "value": "The molecule appears as a colorless to straw-colored liquid with a sharp penetrating odor. Less dense than water and insoluble in water. Flash point below 0 \u00b0F. May be toxic by ingestion. Irritating to skin and eyes. Used to make plastics and pharmaceuticals."}]