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Fragrance ingredient

HYDRATROPIC ALDEHYDE DIMETHYL ACETAL

CAS 90-87-9
64

Safety score · 0–100

Fine

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

A protected acetal form of hydratropic aldehyde used for green, floral fragrance notes. The acetal is more stable than the free aldehyde but can still release the allergenic parent under acidic conditions.

Skin benefits

  • Floral, green hyacinth-like fragrance notes
  • Acetal form is more stable than the free aldehyde
  • Useful in perfume top notes

Known concerns

  • Can hydrolyze back to hydratropic aldehyde, a known allergen
  • Fragrance allergen subject to EU labeling once threshold reached
  • IFRA usage restrictions apply

References

EU

EU CosIng database

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

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Same plant / compound family

58
HYDRATROPIC ALDEHYDE

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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.