tetraethyl lead

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tet·ra·eth·yl lead

also tet·ra·eth·yl·lead  (tĕt′rə-ĕth′əl-lĕd′)
A colorless, poisonous, oily liquid, C8H20Pb, comprised of four ethyl groups on each lead atom, used in gasoline for internal-combustion engines as an antiknock agent.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

tetraethyl lead

(ˌtɛtrəˈiːθaɪl lɛd) or


(Elements & Compounds) a colourless oily insoluble liquid formerly used in petrol to prevent knocking. Its use has been banned in most developed countries due to its toxicity. Formula: Pb(C2H5)4. Systematic name: lead tetraethyl Former names: tetramethyl lead or tetramethyllead
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.tetraethyl lead - a clear oily poisonous liquid added to gasoline to prevent knocking
antiknock - any of various compounds that are added to gasoline to reduce engine knocking
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The current widely available aviation gasoline (avgas) is 100LL, a 100-octane fuel containing relatively low amounts of tetraethyl lead, which is toxic to humans.
At the time, Swift claimed its production costs would be cheaper than conventional petroleum-based avgas with its tetraethyl lead octane package.
Lead, cadmium, manganese, aluminum, tetraethyl lead, methylmercury and tributyltin are some examples.
Boyd had discovered that adding tetraethyl lead to petroleum fuel raised its ignition temperature, allowing higher compression in gasoline engines, which dramatically increased performance.
In addition, car exhausts release lead oxides, resulting from the combustion of tetraethyl lead, into the atmosphere, and this is one of the most widespread routes to leading contamination of marine organisms with metals and the transit of these contaminants via sea fishing to humans and animals.
Many industries, such as battery manufacturing, ammunition, tetraethyl lead manufacturing, ceramic and glass industries printing, and the painting and dying industry, represent significant sources of lead release into the environment [4-6].
For example, subsequent to the EPA regulation requiring all newly built autos sold in the United States to be equipped with catalytic converters, the agency issued regulation banning the sale of leaded gasoline because, unfortunately, the tetraethyl lead disabled the catalytic converter (Newell and Rogers 2003).
Cadmium is released as a by-product of zinc (and occasionally lead) refining; lead is emitted during its mining and smelting activities, from automobile exhausts (by combustion of petroleum fuels treated with tetraethyl lead antiknock) and from old lead paints; mercury is emitted by the degassing of the earth's crust.
Finally, had Seager referenced Gerald Markowitz and David Rosner, or Nancy Langston, she might have seen DES, tetraethyl lead and polyvinyl chloride as appropriate parallels to Carson's attack on DDT.
In the 1970s, gasoline combustion was an important source of air pollution by lead, as tetraethyl lead was added to gasoline at concentrations of approximately 0.4 g [L.sup.-1] (Paoliello and Chasin, 2001; Sharma and Dubey, 2005).