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Banned

Costus root oil (Saussurea lappa Clarke), when used as a fragrance ingredient

CAS 8023-88-9
8

Safety score · 0–100

Avoid

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

Costus root oil — banned from EU cosmetics under Annex II as a fragrance ingredient due to extreme sensitization potential and CITES-protected status. Even trace amounts can provoke severe allergic reactions.

Skin benefits

  • Historic perfumery use (no longer permitted)

Known concerns

  • Extremely potent skin sensitizer
  • EU Annex II prohibited fragrance ingredient
  • Cross-reactivity with sesquiterpene lactones
  • CITES-listed endangered species

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.