hydrocyanic acid

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Related to hydrocyanic acid: prussic acid


 (H) [hi´dro-jen]
a chemical element, atomic number 1, atomic weight 1.00797. (See Appendix 6.) It exists as the mass 1 isotope (protium, or light or ordinary hydrogen), mass 2 isotope (deuterium, heavy hydrogen), and mass 3 isotope (tritium).
hydrogen cyanide an extremely poisonous colorless liquid or gas, HCN, a decomposition product of various naturally occurring glycosides and a common cause of cyanide poisoning. Inhalation of the gas can cause death within a minute. Called also hydrocyanic acid.
heavy hydrogen deuterium.
hydrogen ion concentration the degree of concentration of hydrogen ions (the acid element) in a solution. Its symbol is pH, and it expresses the degree to which a solution is acidic or alkaline. The pH range extends from 0 to 14, pH 7 being neutral, a pH of less than 7 indicating acidity, and one above 7 indicating alkalinity. See also acid-base balance.
hydrogen peroxide H2O2, an antiseptic with a mildly antibacterial action. A 3 per cent solution foams on touching skin or mucous membrane and appears to have a mechanical cleansing action.
hydrogen sulfide H2S, a poisonous gas with an offensive smell, released from decaying organic material, natural gas, petroleum, and sulfur deposits, and sometimes used as a chemical reagent.

hy·dro·cy·an·ic ac·id (HCN),

(hī'drō-sī-an'ik as'id),
HCN; A colorless, toxic liquid, with the odor of bitter almonds, present in bitter almonds (amygdalin), the stones of peaches, plums, and other drupes, and laurel leaves; inhalation of 300 ppm causes death.

hydrocyanic acid

/hy·dro·cy·an·ic ac·id/ (-si-an´ik) hydrogen cyanide; see under hydrogen.

hydrocyanic acid

a volatile liquid that is extremely poisonous because it checks the oxidation process in protoplasm. See also cyanide.
References in periodicals archive ?
The 44 people who died from a fire in a building in Tokyo's Shinjuku Ward at the weekend are believed to have died in one to two minutes after inhaling carbon monoxide or hydrocyanic acid gas, investigators said Tuesday.
Furthermore, its discharge of hydrocyanic acid and other toxic gases when on fire has become a problem.
Hydrocyanic acid potentials in leaf blade tissue of eleven grain sorghum hybrids.
When exposed, it releases hydrocyanic acid (or HCN, prussic acid) into the air.
About 1/50 of an ounce of hydrocyanic acid of stunted arrow grass will kill a 600 pound animal.
Building Block Chemicals - Acrylonitrile and Hydrocyanic Acid, Melamine, Sulfuric Acid