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PEG-23 STEARATE

CAS 9004-99-3
82

Safety score · 0–100

Good

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

About

A PEG ester of stearic acid with 23 moles of EO, used as a hydrophilic emulsifier with low skin irritation and good solubilizing properties.

PEG-23 Stearate is the polyethylene glycol (23 mol EO average) diester of stearic acid. The high ethoxylation degree gives it strong hydrophilic character (HLB ~16) and makes it an effective O/W emulsifier and fragrance/oil solubilizer. EU Cosmetics Regulation permits its use without restriction. The large molecular size of the PEG chain substantially reduces skin penetration, and the diester structure is stable under normal cosmetic conditions. Residual ethylene oxide and 1,4-dioxane must comply with SCCS guidance.

Skin benefits

  • Solubilizes oils and fragrances
  • Mild O/W emulsifier
  • Smooth, lightweight skin feel

Known concerns

  • Potential trace EO/1,4-dioxane contamination from manufacturing

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.