emulsifier
PEG-4 ISOSTEARATE
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A short-chain PEG ester of isostearic acid used as a mild emulsifier and skin conditioning agent. Considered safe in cosmetics, with the usual PEG caveat about impurity control.
Skin benefits
- Mild non-ionic emulsifier and solubiliser
- Helps disperse oils in water-based formulas
- Improves spreadability and skin feel
- Low irritation potential at typical use levels
Known concerns
- Ethoxylated PEG ester; possible 1,4-dioxane trace impurity
- Lower-MW PEG esters may allow some skin penetration
- Quality depends on supplier purification
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Related emulsifiers
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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.