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Banned Substance

diethylstilbestrol

CAS 56-53-1
2

Safety score · 0–100

Avoid

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

A synthetic estrogen banned worldwide after causing cancers in children of women who took it. IARC Group 1 human carcinogen and EU Annex II prohibited — never legal in cosmetics.

Skin benefits

  • No legitimate cosmetic benefit

Known concerns

  • IARC Group 1 human carcinogen
  • EU Annex II prohibited
  • Transplacental carcinogen (clear-cell adenocarcinoma)
  • Severe endocrine disruptor
  • Reproductive toxin

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.