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Humectant

PEG-4

CAS 25322-68-3
65

Safety score · 0–100

Fine

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

A short-chain polyethylene glycol — acts as a humectant and solubilizer. Usually safe, but can increase penetration of other actives.

Skin benefits

  • Water-miscible humectant and solubilizer
  • Improves formula solubility of actives
  • Low skin irritation

Known concerns

  • Possible trace 1,4-dioxane if not purified
  • Low-MW PEG can enhance skin penetration of other ingredients
  • Not for broken or compromised skin

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.