quaternary ammonium compound


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quaternary ammonium compound

n.
Any of a group of compounds composed of a cation, in which a central nitrogen atom is joined to four organic groups, and any of various anions, used as antiseptics, solvents, and emulsifying agents.
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.

quaternary ammonium compound

n
(Elements & Compounds) a type of ionic compound that can be regarded as derived from ammonium compounds by replacing the hydrogen atoms with organic groups
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

quat′ernary ammo′nium com`pound


n.
any of a class of salts derived from ammonium in which the nitrogen atom is attached to four organic groups; used as antiseptics and disinfectants.
[1815–25]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.quaternary ammonium compound - a compound derived from ammonium with hydrogen atoms replaced by organic groups; used as surface-active agents, disinfectants, and in drugs
organic compound - any compound of carbon and another element or a radical
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References in periodicals archive ?
The composition is comprised of a quaternary ammonium compound; tallow; isopropyl alcohol; and a plasticizer comprising a compound having an iso-methyl group.
In the case of AH Plus, which is based on an epoxy system, the fact that the presence of the quaternary ammonium compound CPC improves the strength may be considered to arise from an enhancement of the setting process.
These phenomena can be explained by the hydrophobic film resulting from absorption of quaternary ammonium compounds on MMT, which blocks the water penetrating into the clay and prevents clay from hydrating swelling.
Quaternary ammonium tetrafluoroborates were synthesized through the reaction of 1.1 mol of tetrafluoroborate sodium aqueous solution and 1 mol of quaternary ammonium compound. The reaction was enhanced by stirring the mixture at room temperature for 3 to 5 hours.
* Algaecide (quaternary or poly quaternary ammonium compound)
To make an organoclay, the smectite clay is reacted with a quaternary ammonium compound as shown.
Cultivars within each quaternary ammonium compound (QAC) level class (QAC level of the betaine fractions of the flag leaf) of diverse field-grown sorghum cultivars at the post-flowering stage.
The commonly used copper monoethanolamine-based ACQ formulations contain copper compounds and a quaternary ammonium compound (quat) as a cobiocide, e.g., didecyl dimethyl ammonium chloride (DDAC) or benzalkyl ammonium chloride.
Vantocileao FHC is based on the active ingredient poly (hexamethylene biguanide) hydrochloride (PHMB) in combination with a quaternary ammonium compound (alkyl dimethyl ammonium chloride).
Lonza's Carboquat is a quaternary ammonium compound that could be used to treat wood flour for WPCs.
A glass-fiber matrix is precoated with a positively charged quaternary ammonium compound that, after hemolysis of the blood sample, electrostatically captures the negatively charged glycohemoglobin complex.
The formulations most commonly used by the BC industry are based on the quaternary ammonium compound didecyldimethylammonium chloride (DDAC).