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| OtherNames = |Section1= |Section2= |Section3= |Section4= |Section5= |Section6= }} Hydrogen cyanide (HCN), sometimes called prussic acid, is an organic compound with the chemical formula HCN. It is a colorless, extremely poisonous liquid that boils slightly above room temperature, at .〔http://www.wolframalpha.com/input/?i=boiling+point+of+Hydrogen+cyanide〕 HCN is produced on an industrial scale and is a highly valuable precursor to many chemical compounds ranging from polymers to pharmaceuticals. ==Structure and general properties== Hydrogen cyanide is a linear molecule, with a triple bond between carbon and nitrogen. A minor tautomer of HCN is HNC, hydrogen isocyanide. Hydrogen cyanide is weakly acidic with a pKa of 9.2. It partially ionizes in water solution to give the cyanide anion, CN−. A solution of hydrogen cyanide in water, represented as HCN, is called ''hydrocyanic acid''. The salts of the cyanide anion are known as cyanides. HCN has a faint bitter almond-like odor that some people are unable to detect owing to a genetic trait.〔(【引用サイトリンク】Online Mendelian Inheritance in Man "> url = http://www.ncbi.nlm.nih.gov/omim/304300 )〕 The volatile compound has been used as inhalation rodenticide and human poison, as well as for killing whales. Cyanide ions interfere with iron-containing respiratory enzymes. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「hydrogen cyanide」の詳細全文を読む スポンサード リンク
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