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Antioxidant

DICYCLOPENTADIENE/T-BUTYLCRESOL COPOLYMER

CAS 220997-66-0
70

Safety score · 0–100

Fine

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

A resin polymer built from dicyclopentadiene and a t-butylcresol — used as a polymeric antioxidant and structuring resin in lip and stick products. Bigger than free BHT-type antioxidants and largely inert once polymerised; cosmetic data set is modest.

Function

ANTIOXIDANT

Skin benefits

  • Polymeric antioxidant for cosmetic formulas
  • Adds resin body to lip and stick products
  • Reduces volatility of phenolic antioxidants

Known concerns

  • Built from t-butylcresol, a related BHT/BHA chemistry
  • Residual monomers can be mild sensitisers
  • Limited cosmetic-grade safety dossier

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.