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Banned Substance

Methyloxirane (Propylene oxide)

CAS 75-56-9 Updated
3

Safety score · 0–100

Avoid

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

About

Propylene oxide is a reactive epoxide used as an industrial monomer. IARC Group 2B carcinogen and mutagen — banned in EU cosmetics under Annex II.

Skin benefits

  • Industrial monomer for polyurethanes and propylene glycol

Known concerns

  • EU Annex II banned in cosmetics
  • IARC Group 2B carcinogen
  • Mutagen and reproductive toxicant
  • Highly flammable and reactive epoxide

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.