Fragrance
HEXAHYDRO-METHANOINDEN-5-YL ISOBUTYRATE
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A woody-herbaceous fragrance ester based on a hydrogenated indane. Stable, widely used in perfume bases.
Hexahydro-methanoinden-5-yl isobutyrate (CAS 67634-20-2) is a synthetic fragrance ester based on the hexahydromethanoindane scaffold. It provides a woody, herbaceous, slightly camphoraceous character and is used as a fragrance ingredient in a wide range of cosmetic and household product perfume bases. As a hydrogenated ester it is chemically stable and not a Michael acceptor like many fragrance aldehydes. IFRA standards apply. It is not on the EU Annex III list of declarable fragrance allergens. Aquatic toxicity is a generic concern for hydrophobic fragrance chemicals. At typical perfume-composition usage levels tolerability is good.
Skin benefits
- Woody-herbaceous fragrance ester
- Stable in most formulations
- Typical perfume base material
Known concerns
- Fragrance ester — potential mild skin sensitization
- IFRA guidance applies
- Aquatic-toxicity watch for hydrophobic fragrance chemicals
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.