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quaternary ammonium compound


from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of a group of compounds in which a central nitrogen atom is joined to four organic radicals and one acid radical, used as antiseptics, solvents, and emulsifying agents.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An amine derivative, containing four radicals, of general formula R1R2R3R4-N+X-; the radicals may be the same, different, or part of a ring; X is any univalent anion such as OH-.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a compound derived from ammonium with hydrogen atoms replaced by organic groups; used as surface-active agents, disinfectants, and in drugs


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