Preservative
O-CYMEN-5-OL
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A thymol-related phenolic preservative — keeps cosmetics free of bacteria and mould. The EU caps it at 0.1% under Annex V, and formulators avoid combining it with other phenolic sensitizers in leave-on products.
Skin benefits
- Effective broad-spectrum preservative
- Stable across pH and temperature
- Limits microbial spoilage
Known concerns
- EU strictly limits use to 0.1%
- Phenolic structure can irritate sensitive skin
- Class-allergens reported in some users
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
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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.