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Banned fragrance allergen

3-Chloro-2,6-Dihydroxy-4-methyl-benzaldehyde (chloroatranol)(*)

CAS 57074-21-2
8

Safety score · 0–100

Avoid

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

Chloroatranol is one of the most potent contact allergens known in fragrance, derived from oakmoss. It is banned from cosmetic use across the EU because even tiny traces can trigger lasting skin allergy.

Skin benefits

  • Historically a fragrance component of oakmoss absolute
  • No legitimate consumer cosmetic benefit at current regulatory status

Known concerns

  • Banned in EU cosmetics under Annex II (Reg. 1223/2009)
  • Extreme contact allergen, sensitisation at very low doses
  • Cross-reacts with oakmoss/treemoss fragrance allergens
  • SCCS identified as one of the most potent fragrance allergens known

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, so always read the physical product label and consult a healthcare professional for personal concerns.