5-NONEN-2-ONE
Moderate
CAS Number: 27039-84-5
About 5-NONEN-2-ONE
An unsaturated ketone with green-fruity fragrance characteristics and moderate sensitization potential subject to IFRA restrictions in the EU cosmetic market.
Detailed Analysis
5-Nonen-2-one is an alpha,beta-unsaturated methyl ketone with green, fruity odor characteristics. It is subject to IFRA guidelines due to its unsaturated ketone structure. It is not specifically listed in EU cosmetic regulation Annexes II or III. The PubChem safety score of 50 indicates moderate concern primarily related to its sensitizing potential as an enone.
Known Concerns
- ⚠ Skin sensitization (alpha,beta-unsaturated ketone, IFRA)
- ⚠ Moderate hazard profile
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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