Hydrocyanic acid (chemical formula: HCN) is a colorless, toxic liquid of hydrogen cyanide. It is present in bitter almonds (a mygdalin), the stones of peaches, laurel leaves, plums, and other fruits. It is highly poisonous and flammable. It is used as a fumigant and a precursor to polymer and pharmaceutical manufacturing. Abbreviation: HCN. Synonyms: prussic acid, formic anammonide, methanenitrile, hydrogen cyanide.
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