Fragrance
3 and 4-(4-Hydroxy-4-methylpentyl)cyclohex-3-ene-1-carbaldehyde A
Safety score · 0–100
Avoid
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
Better known as HICC or Lyral, a lily-of-the-valley fragrance aldehyde. EU banned this ingredient in cosmetics as of August 2021 due to its strong contact allergen status.
Skin benefits
- Historic use as muguet (lily of the valley) fragrance
- Powerful floral scent at trace levels
Known concerns
- EU Annex II banned fragrance allergen (HICC/Lyral)
- One of the most frequent contact allergens in fragrances
- Banned in EU products on market since 23 Aug 2021
- Causes contact dermatitis and skin sensitization
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, so always read the physical product label and consult a healthcare professional for personal concerns.