Fragrance
3-METHYL-5-(2,2,3-TRIMETHYL-3-CYCLOPENTENYL)PENT-3-EN-2-ONE
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A synthetic woody fragrance ingredient in the cedar/sandalwood family. Works as a musk/woody modifier; moderate allergen-class risk.
3-Methyl-5-(2,2,3-trimethyl-3-cyclopentenyl)pent-3-en-2-one (CAS 65113-95-3) is a synthetic woody fragrance ingredient used as a sandalwood/cedar alternative in perfume compounds. Like many cyclopentenyl ketones in this class, it has modest allergenic potential and falls under IFRA usage guidance. The SCCS has been reassessing fragrance allergen declarations; this specific material is not individually called out but sits in an adjacent chemical space. Public peer-reviewed skin-toxicology data are limited. Concentrations in finished cosmetics are small (typically <0.5%).
Skin benefits
- Woody, sandalwood-like fragrance
- Long-lasting odour performance
- Synthetic alternative to natural sandalwood
Known concerns
- Fragrance sensitisation potential
- IFRA-class scrutiny
- Limited peer-reviewed data
- Not for fragrance-reactive skin
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related fragrances
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.