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PEG-5 STEARATE

CAS 9004-99-3
78

Safety score · 0–100

Fine

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

About

A short-chain polyethylene glycol stearate ester used as an emulsifier and opacifying agent in cosmetic formulations, particularly in cream products.

PEG-5 STEARATE is the esterification product of polyethylene glycol (5 EO units) with stearic acid, producing a short-chain PEG fatty acid ester with moderate hydrophilic character. The short 5-unit EO chain means it can contribute some skin penetration potential, but stearic acid's well-established safety profile and the CIR assessment of PEG stearates support cosmetic use. Not restricted in EU Annexes II or III. Widely used in emulsified cream formulations.

Skin benefits

  • emulsifying
  • opacifying
  • skin conditioning

Known concerns

  • skin absorption potential (short EO chain)
  • ethylene oxide contamination (potential)
  • 1,4-dioxane contamination (potential)

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.