| 单词 | quaternary ammonium compound |
| 释义 | quaternary ammonium compound 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 quaternary ammonium salt. [1815-25] |
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