[{"from": "human", "value": "Provide a brief overview of this molecule. [C][#N]"}, {"from": "gpt", "value": "The molecule is a chemical compound with chemical formula HCN. It is a colorless, extremely poisonous liquid that boils slightly above room temperature at 26 C (79\u040eF). A hydrogen cyanide concentration of 300 mg/m3 in air will kill a human within 10\u042060 minutes.[38] A hydrogen cyanide concentration of 3500 ppm (about 3200 mg/m3) will kill a human in about 1 minute.[38] The toxicity is caused by the cyanide ion, which halts cellular respiration by acting as a non-competitive inhibitor for an enzyme in mitochondria called cytochrome c oxidase."}]