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Prohibited pesticide

Fenthion (ISO)

CAS 55-38-9
3

Safety score · 0–100

Avoid

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

Fenthion is a toxic organophosphate insecticide banned from cosmetics. It blocks nerve enzymes and is dangerous to humans and wildlife, so it must never appear in any personal care product.

Skin benefits

  • Was used historically as an agricultural insecticide
  • Has no cosmetic application of any kind

Known concerns

  • Organophosphate pesticide and cholinesterase inhibitor
  • Banned in EU cosmetics (Annex II) and pesticide use restricted
  • Acutely toxic by oral, dermal, and inhalation exposure
  • Suspected endocrine disruptor and reproductive toxicant

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.