OCTAHYDRO-TETRAMETHYL-1-NAPHTHALENOL
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A polycyclic aromatic sesquiterpene alcohol with a tetramethyl-tetrahydronaphthalene structure, used as a woody fragrance material. Listed in EU Annex III with specific concentration limits due to skin sensitization and environmental hazards.
Octahydro-Tetramethyl-1-Naphthalenol is a polycyclic sesquiterpene alcohol structurally related to synthetic sandalwood alternatives such as Javanol. It is listed in EU Annex III of the Cosmetics Regulation with specific concentration limits for different product types (0.1% leave-on, 1% hydroalcoholic, 2.5% fine fragrance, 0.5% fragrance cream, 0.2% rinse-off). The H315, H400, H410 classifications indicate skin irritation, acute aquatic toxicity, and chronic aquatic toxicity, respectively. The tetramethyl substitution pattern on the tetralin ring raises sensitization concerns.
Skin benefits
- Provides long-lasting woody, sandalwood-like fragrance
- Fixative properties extend scent longevity
Known concerns
- EU Annex III restricted with product-type concentration limits
- Skin irritant (H315)
- Very toxic to aquatic life (H400)
- Very toxic to aquatic life with long-lasting effects (H410)
- Woody fragrance sensitizer potential
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Check your shelf
Find OCTAHYDRO-TETRAMETHYL-1-NAPHTHALENOL in your products.
Scan any cosmetic product with LuxSense to see if it contains OCTAHYDRO-TETRAMETHYL-1-NAPHTHALENOL and get a full ingredient breakdown with safety scores.
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.