[{"from": "human", "value": "Provide a description of this molecule. [C][N][=C][=O]"}, {"from": "gpt", "value": "The molecule appears as a colorless low-boiling liquid (b.p. 39 \u00b0C) that is denser than water. Flash point is less than 20 \u00b0F. Very toxic by inhalation. Can be absorbed through the skin. Has a sharp odor, but the sense of smell cannot be relied upon to warn of the presence of vapors at low concentrations.   Rate of onset: Immediate  Persistence: Minutes to hours  Odor threshold: 2.1 ppm  Source/use/other hazard: Intermediate in manufacturing; reacts with H20 (don't use in fire)."}]