Isoprene

Isoprene
One of the major components that makes up natural rubber and is used to make synthetic rubbers. It is also emitted from plants and trees, has been detected in tobacco smoke and automobile exhaust. Isoprene is a possible carcinogen (cancer-causing agent). The US government in 2000 classified it as "reasonably anticipated to be a human carcinogen." In laboratory animal studies of isoprene, cancer was observed in multiple organ sites following long-term inhalation exposures.
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2-Methyl-1,3-butadiene; an unsaturated five-carbon hydrocarbon with a branched chain, which in the plant and animal kingdom is used as the basis for the formation of isoprenoids; e.g., terpenes, carotenoids and related pigments, rubber. Fat-soluble vitamins either are isoprenoid or have isoprenoid side chains; steroids are synthesized via isoprenoid intermediates as are ubiquinone, dolichol, and prenylated proteins.

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iso·prene 'ī-sə-.prēn n a flammable liquid unsaturated hydrocarbon C5H8 used esp. in synthetic rubber

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iso·prene (iґso-prēn) an unsaturated branched chain five-carbon hydrocarbon that is the molecular unit of isoprenoid compounds.


Medical dictionary. 2011.

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  • isoprène — [ izɔprɛn ] n. m. • v. 1868; probablt de iso et pr(opyl)ène 1 ♦ Chim. Liquide volatil, de formule C5H8, qui peut se polymériser en une substance analogue au caoutchouc (⇒ élastomère). Adj. ISOPRÉNIQUE . 2 ♦ Biochim. Unité constitutive des… …   Encyclopédie Universelle

  • Isoprene — I so*prene, n. [Etymol. uncertain.] (Chem.) An oily, volatile unsaturated hydrocarbon ({C5H8}), obtained by the distillation of caoutchouc or gutta percha, and used to make synthetic rubber by polymerization. In organic chemistry, it is viewed… …   The Collaborative International Dictionary of English

  • isoprene — [ī sōprēn΄, ī səprēn΄] n. [coined (1860) by C. G. Williams (1829 1910), Brit chemist < ISO + PR(OPYL) + ENE] a colorless, volatile liquid, CH2:C(CH3)CH:CH2, prepared by the dry distillation of raw rubber or synthetically: when heated with… …   English World dictionary

  • Isoprene — Chembox new Name = Isoprene ImageFileL1 = Isoprene.svg ImageSizeL1 = 100px ImageFileR1 = Isoprene 3d.png ImageSizeR1 = 120px IUPACName = 2 Methyl buta 1,3 diene OtherNames = isoprene Section1 = Chembox Identifiers CASNo = 78 79 5 SMILES = C=C(C)C …   Wikipedia

  • isoprene — /uy seuh preen /, n. Chem. a colorless, volatile, water insoluble liquid, C5H8, of the terpene class, usually obtained from rubber or from oil of turpentine by pyrolysis: used chiefly in the manufacture of synthetic rubber by polymerization.… …   Universalium

  • isoprene — i·so·prè·ne s.m. TS chim. idrocarburo dei dieni a cinque atomi di carbonio, liquido incolore e volatile, la cui molecola è l unità costitutiva del caucciù e di altre sostanze naturali {{line}} {{/line}} DATA: 1869. ETIMO: der. di iso e… …   Dizionario italiano

  • isoprene — izoprenas statusas T sritis chemija formulė CH₂=C(CH₃)CH=CH₂ atitikmenys: angl. isoprene rus. изопрен ryšiai: sinonimas – 2 metil 1,3 butadienas …   Chemijos terminų aiškinamasis žodynas

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