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Quick answer: Alpha-isomethyl ionone carries the heavier risk profile. Alpha-isomethyl ionone is warning label required in the EU and allowed in the US; Chloroatranol is banned in the EU and allowed in the US.
| Property | Alpha-isomethyl ionone | Chloroatranol |
|---|---|---|
| EU status | Warning label required | Banned |
| US status | Allowed | Allowed |
| Risk level | low | medium |
| Banned in | — | European Union |
| Restricted in | European Union | — |
| Category | fragrance | fragrance |
| Where it hides | perfume, scented products | oakmoss fragrance, perfume |
Alpha-isomethyl ionone (Alpha-Isomethyl Ionone) is a fragrance allergen.
Chloroatranol (Chloroatranol) is an oakmoss-derived fragrance allergen.
Alpha-isomethyl ionone: An EU-listed fragrance allergen requiring declaration.
Chloroatranol: One of the strongest contact allergens; banned in EU cosmetics.
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