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Dictionary

quat'ernary ammo'nium com"pound

Chem.
any of a class of salts derived from ammonium in which the nitrogen atom is attached to four organic groups, as in benzalkonium chloride; the salts are cationic surface-active compounds used as antiseptics and disinfectants. Also called quat'ernary ammo'nium salt".

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

quaternary

quaternate

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