quartenary ammonium compound

quar·te·nar·y am·mo·ni·um com·pound

(kwahtĕr-nar-ē ă-mōnē-ŭm kompownd)
A substance used as a mouth freshening agent in over-the-counter mouth rinse.
References in periodicals archive ?
Hyoscine butylbromide (HBB) is derived from hyoscine, extract of tree dubosia, which is present in Australia and has antispasmodic action and is known since 19575 Hyoscine is quartenary ammonium compound which has spasmolytic effect on smooth muscles of genitourinary tract and gastrointestinal tract.