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3-PHENYLBUTYRALDEHYDE

CAS 16251-77-7
58

Safety score · 0–100

Moderate

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

About

An aromatic aldehyde fragrance ingredient with recognized skin-sensitizing properties that requires declaration in the EU.

3-Phenylbutyraldehyde is an aromatic aldehyde used as a fragrance material in cosmetics. Aldehydes of this type are known contact allergens and must be declared in the list of ingredients when present above 0.001% in leave-on products or 0.01% in rinse-off products under EU Regulation 1223/2009. Its sensitizing potential places it in the moderate-concern category.

Skin benefits

  • Provides fragrance to cosmetic formulations

Known concerns

  • Confirmed skin sensitizer
  • Must be declared per EU allergen rules
  • Potential for cross-reactivity with other aldehydes

References

EU

EU CosIng database

European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.

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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.