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Myrtrimonium Bromide
Myrtrimonium Bromide
A trimonium, related to cetrimonium bromide, used as a preservative.
What it does
It’s a trimonium with a 14-carbon chain, a shorter relative of cetrimonium bromide. The EU lists it as a preservative.
The evidence, graded
expert consensusEU Regulation 1223/2009, Annex V entry 44, lists alkyl (C12–22) trimethyl ammonium bromides and chlorides among the preservatives allowed in cosmetics, with a maximum of 0.1%. Myrtrimonium bromide is one of them: US safety reviewers give its chain as 14 carbons. The entry’s footnotes send only three chlorides to Annex III for other uses, so under Article 14(1)(d)(ii) the cap holds for myrtrimonium bromide whatever its job.EU 2026 · Official Journal of the European Union (consolidated version, EUR-Lex) ↗
expert consensusUS safety reviewers (2012) looked at the trimoniums, a group of ingredients that includes behentrimonium methosulfate, myrtrimonium bromide and carnitine. They say the group is used mainly to cleanse, to condition hair and to stop static. They judged the group safe at the amounts and in the ways cosmetics use it, in products made not to irritate.Becker 2012 · International Journal of Toxicology ↗
Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.
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