Antimicrobial / quaternary ammonium
LAURYL ISOQUINOLINIUM BROMIDE
Safety score · 0–100
Avoid
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
Lauryl isoquinolinium bromide is a cationic quaternary ammonium surfactant with strong antimicrobial action, but its corrosive, irritant and ecotoxic properties strictly limit any cosmetic use.
Skin benefits
- Acts as a quaternary ammonium antimicrobial preservative in some formulations
- Effective surfactant and cationic conditioning agent in limited industrial contexts
Known concerns
- Quaternary ammonium compound flagged as toxic if swallowed and harmful in contact with skin (GHS Acute Tox.)
- Causes severe skin burns and eye damage; corrosive at typical concentrations
- Toxic to aquatic life with long-lasting environmental effects
- Not considered safe for leave-on cosmetic use without strict concentration limits
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Same plant / compound family
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.