Definitions from Wiktionary (quaternary ammonium compound)

▸ noun:  (chemistry) 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⁻.
▸ Also see quaternary_ammonium_compound


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