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NONADIENAL

CAS 557-48-2
48

Safety score · 0–100

Moderate

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

About

Nonadienal is a cosmetic ingredient. Exercise caution due to limited available safety data.

Nonadienal (also called trans,trans-2,6-nonadienal or violet leaf aldehyde) is an unsaturated aldehyde responsible for cucumber and violet notes in fragrances. It carries H315 (skin irritation) and H317 (skin sensitization). It is listed as a fragrance allergen under EU regulation 1223/2009 Annex III, requiring declaration on product labels when present above 0.001% in leave-on or 0.01% in rinse-off products.

Skin benefits

  • Fragrance component

Known concerns

  • Skin sensitization (H317)
  • Skin irritation (H315)
  • EU declared fragrance allergen
  • Potential for oxidative sensitization

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.