Skip to content

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.

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.

Check your shelf

Find 3-PHENYLBUTYRALDEHYDE in your products.

Scan any cosmetic product with LuxSense to see if it contains 3-PHENYLBUTYRALDEHYDE and get a full ingredient breakdown with safety scores.

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.