Ingredient · dataset v56
Myrtrimonium Bromide and fungal acne
No known trigger
Why it's not a known trigger
A C14 alkyl quaternary ammonium preservative; the fatty chain is bound to nitrogen, not an ester Malassezia yeast splits (behentrimonium chloride neutral precedent). Round-5 2b, approved.
Evidence strength
Judged neutral — no trigger evidence
Function
Quat
Also listed as
Myristyltrimethylammonium Bromide
Checked products with this ingredient (2)
Product types: Micellar waters
Micellar waters (2)
- Garnier Micellar Cleansing Water with Vitamin C 13.5 fl oz
- Garnier Micellar Cleansing Water with Salicylic Acid 13.5 fl oz
Related quat
- Behentrimonium Chloride — No known trigger
- Behentrimonium Methosulfate — No known trigger
- Benzalkonium Chloride — No known trigger
- Cetrimonium Methosulfate — No known trigger
- Stearalkonium Chloride — No known trigger
- Steartrimonium Chloride — No known trigger
Sources
EU CosIng database — search the INCI name
Last reviewed: 2026-10-13 (dataset v56).
Questions
Does Myrtrimonium Bromide trigger fungal acne?
No known trigger: A C14 alkyl quaternary ammonium preservative; the fatty chain is bound to nitrogen, not an ester the yeast splits (behentrimonium chloride neutral precedent). Round-5 2b, approved.
Does Myrtrimonium Bromide feed Malassezia?
No known link: Myrtrimonium Bromide is judged with no known trigger. One screened ingredient is not a product verdict — when in doubt, ask a dermatologist.
Is this medical advice?
No. We screen ingredient lists; we never diagnose, treat, or certify products. When in doubt, ask a dermatologist.
Check a full list containing Myrtrimonium Bromide →
Not medical advice: we screen ingredient lists for potential triggers — we never diagnose, treat, or certify products. Dataset v56.