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Surfactant

Laureth-9

CAS 3055-99-0
55

Safety score · 0–100

Moderate

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

Also called polidocanol — a PEG-9 lauryl ether that doubles as a surfactant and a mild topical anesthetic. EU allows it up to a few percent, but its numbing effect can hide sensations of irritation or damage on broken skin.

Skin benefits

  • Mild topical anesthetic effect (polidocanol)
  • Effective non-ionic surfactant and solubilizer
  • EU-approved at controlled levels

Known concerns

  • Can mask sensations of irritation or damage
  • Possible residual ethylene oxide / 1,4-dioxane traces
  • Sensitization reported in patch testing

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.