FARNESENE
Fragrance
Good
CAS Number: 502-61-4 (a-) / 18794-84-8 (b-)
About FARNESENE
A natural sesquiterpene found in apple skin, ginger, and many plants — used as a fragrance ingredient. Generally mild but can oxidize and become a skin sensitizer.
Detailed Analysis
Farnesene exists as alpha-farnesene (CAS 502-61-4) and beta-farnesene (CAS 18794-84-8), both being sesquiterpene hydrocarbons (C₁₅H₂₄). Found naturally in apple peel coating, ginger, turmeric, and various essential oils. Used in cosmetics as a fragrance and perfuming ingredient. Like many terpenes, farnesene is susceptible to autoxidation, and its oxidation products (farnesene hydroperoxides) are known skin sensitizers. IFRA (International Fragrance Association) provides guidelines for its use. The unoxidized form has low toxicity, but storage and formulation must minimize oxidation.
What It Does
Skin Benefits
- ✓ Pleasant natural fragrance
- ✓ Naturally derived from renewable plant sources
Known Concerns
- ⚠ Oxidation products are skin sensitizers
- ⚠ Autoxidation during storage can create allergenic hydroperoxides
- ⚠ Fragrance ingredient — sensitization potential
- ⚠ Environmental persistence concerns for terpenes
Safety Score
Good
Based on EU regulatory data, published safety research, and ingredient function analysis.
References
EU CosIng Database
European Commission cosmetic ingredient registry
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Download LuxSenseThis information is for educational purposes only and does not constitute medical advice. Always consult a healthcare professional for skin concerns or allergies.