6-ETHYL-3-METHYLOCT-5-ENOL
Other
Moderate
CAS Number: 26330-64-3
About 6-ETHYL-3-METHYLOCT-5-ENOL
An unsaturated secondary alcohol fragrance ingredient with potential for skin oxidation and sensitization, requiring IFRA declaration in the EU.
Detailed Analysis
6-Ethyl-3-methyloct-5-enol is an unsaturated terpene alcohol used as a fragrance ingredient imparting green, citrus, or floral notes. Like other unsaturated C8-C10 alcohols in fragrance compositions, it may undergo oxidation in air to form hydroperoxides and aldehydes that act as skin sensitizers. IFRA standards require antioxidant-stabilized formulations for this class. EU cosmetic labeling under Regulation 1223/2009 mandates declaration of fragrance allergens, and unsaturated terpenes fall under the IFRA declaration requirement at 0.01% in rinse-off products.
Known Concerns
- ⚠ Unsaturated alcohol - oxidation products are skin sensitizers
- ⚠ Requires antioxidant stabilization in cosmetic formulations
- ⚠ IFRA declaration required at ≥0.01%
Safety Score
Moderate
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.