Preservative
BENZALKONIUM CHLORIDE
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A potent quaternary-ammonium preservative — very effective antimicrobial but a well-documented skin and eye irritant. EU limits to 0.1% in rinse-off products only; not a good leave-on choice on sensitive skin.
Skin benefits
- Broad-spectrum bacterial/fungal control
Known concerns
- Confirmed contact allergen
- Eye irritation, especially in eye-area products
- EU Annex V restriction: 0.1% rinse-off only as preservative
- Can disrupt skin microbiome with prolonged use
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
PubChem
U.S. NIH compound data, GHS hazard codes and toxicity literature.
Related preservatives
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.