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ACETALDEHYDE ETHYL LINALYL ACETAL

CAS 40910-49-4
52

Safety score · 0–100

Moderate

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

About

An acetal combining acetaldehyde with linalool fragments, used as a fragrance ingredient with a floral, citrus, and slightly woody scent.

This acetal is derived from acetaldehyde and linalool, both well-known fragrance allergens. It carries hazard statements H226 (flammable liquid), H315 (skin irritant), and H412 (aquatic toxicity). The compound releases both acetaldehyde and linalool upon skin contact, creating a dual sensitization risk. EU Annex III requires labeling of both acetaldehyde and linalool release risk, and IFRA imposes strict concentration limits on this class of acetal ingredients. PubChem safety score is 58, reflecting significant regulatory concern.

Known concerns

  • H226 — flammable liquid
  • H315 — skin irritation
  • H412 — harmful to aquatic life with long-lasting effects
  • Releases linalool, a recognized EU Annex III fragrance allergen
  • Releases acetaldehyde, a known fragrance allergen and sensitizer
  • IFRA severely restricted fragrance ingredient

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.