Other
BUTYL CINNAMALDEHYDE
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
Butyl Cinnamaldehyde is a cosmetic ingredient used in product formulations. Exercise caution due to limited available safety data.
Butyl cinnamaldehyde (also 2-butyl-3-phenylacrolein or alpha-pentylcinnamaldehyde) is a cinnamaldehyde derivative with a warm, spicy, cinnamon-like fragrance. It is a known fragrance allergen classified under IFRA Standards and listed in EU CosIng Annex III for mandatory declaration. The alpha,beta-unsaturated aldehyde structure is a structural alert for sensitisation, and positive human repeat insult patch test (HRIPT) data at high concentrations have been documented. EU regulation requires allergen declaration on cosmetic labels. The score reflects its confirmed allergen status, placing it in the sensitiser category.
Skin benefits
- Fragrance with warm, spicy cinnamon character
Known concerns
- IFRA-classified fragrance allergen - requires mandatory declaration
- Confirmed contact sensitiser
- Alpha,beta-unsaturated aldehyde structural alert
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related others
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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.