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ACETALDEHYDE DIPHENETHYL ACETAL

CAS 122-71-4
55

Safety score · 0–100

Moderate

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

About

Acetaldehyde Diphenethyl Acetal (CAS 122-71-4) is an acetal formed from acetaldehyde and phenethyl alcohol. CosIng-listed with no assigned cosmetic functions, no EU restrictions, and no GHS hazard classifications. Phenethyl alcohol is a common fragrance ingredient, and this acetal likely serves as a fragrance precursor. The absence of GHS hazards is favorable. Exercise caution due to limited available safety data.

Acetaldehyde diphenethyl acetal is a fragrance ingredient used to impart floral notes in cosmetic products. Acetaldehyde is classified as H350 (may cause cancer) in its free form, but this acetal derivative releases acetaldehyde only slowly. It is not listed on EU Annex restrictions but the acetaldehyde association and fragrance classification place it in the moderate sensitivity range (55). IFRA standards may apply.

Skin benefits

  • Fragrance function in cosmetic formulations

Known concerns

  • Fragrance allergen with mild sensitisation potential at high concentrations
  • Acetaldehyde association raises minor cancer concern
  • IFRA restriction applies

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.