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PEG-30 ISOSTEARATE

CAS 56002-14-3
84

Safety score · 0–100

Good

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

A higher-degree PEG ester of isostearic acid with 30 moles of EO, serving as a hydrophilic emulsifier and skin-tolerant surfactant in cosmetic formulations.

PEG-30 Isostearate is the polyethylene glycol (30 mol EO average) ester of isostearic acid, a branched C18 fatty acid. The high degree of ethoxylation gives it strong hydrophilic character (HLB ~16) and makes it an effective O/W emulsifier. The branched fatty acid structure reduces packing efficiency and crystallization, resulting in a smoother skin feel. The EU Cosmetics Regulation lists it without restriction; the high EO degree minimizes skin penetration and irritation risk. It is considered well-tolerated on skin.

Skin benefits

  • Hydrophilic O/W emulsifier
  • Smooth, non-greasy skin feel
  • Good skin tolerance from branched fatty acid

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, so always read the physical product label and consult a healthcare professional for personal concerns.