Cetrimonium, cetyl trimethylammonium, or hexadecyltrimethylammonium is a

quaternary ammonium cation In organic chemistry, quaternary ammonium cations, also known as quats, are positively-charged polyatomic ions of the structure , where R is an alkyl group, an aryl group or organyl group. Unlike the ammonium ion () and the primary, secondary, ...

whose salts are used as antiseptics: *

Cetrimonium bromide Cetrimonium bromide, also known with the abbreviation CTAB, is a quaternary ammonium surfactant with a condensed structural formula C16H33)N(CH3)3r. It is one of the components of the topical antiseptic cetrimide. The cetrimonium (hexadecyltr ...

Cetrimonium chloride Cetrimonium chloride, or cetyltrimethylammonium chloride (CTAC), is a topical antiseptic and surfactant. Long-chain quaternary ammonium surfactants, such as cetyltrimethylammonium chloride (CTAC), are generally combined with long-chain fatty alc ...

They have the

ATC code The Anatomical Therapeutic Chemical (ATC) Classification System is a drug classification system that classifies the active ingredients of drugs according to the organ or system on which they act and their therapeutic, pharmacological and chemica ...

s (as skin antiseptics) and (as throat antiseptics).

References

{{Chemistry index Antiseptics Quaternary ammonium compounds