English
Noun
en-noun|sg=quaternary ammonium compound
- chemistry An amine derivative, containing four radicals, of general formula R<sub>1</sub>R<sub>2</sub>R<sub>3</sub>R<sub>4</sub>-N<sup>+</sup>X<sup>-</sup>; the radicals may be the same, different, or part of a ring; X is any univalent cation such as OH<sup>-</sup>.
Related terms
primary amine
secondary amine
tertiary amine
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