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Emulsifier

C9-11 PARETH-40

CAS 169107-21-5
65

Safety score · 0–100

Fine

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

A non-ionic ethoxylated alcohol used as an emulsifier and solubiliser. Generally safe at typical use levels; main caveat is the 1,4-dioxane impurity profile of all PEG/pareth chemistries.

Function

EMULSION STABILISING

Skin benefits

  • Effective non-ionic emulsifier
  • Good for solubilising oils
  • Stable across pH
  • Mild rinse-off cleansing

Known concerns

  • Possible 1,4-dioxane and ethylene oxide residues
  • Eye irritation at higher %
  • Penetration enhancer at high concentrations

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.