PEG-4 DIOLEATE
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
A PEG-based diester of oleic acid — acts as an emulsifier and skin-conditioning agent, though the ethoxylation chain raises some concerns.
PEG-4 Dioleate is a polyethylene glycol (4 EO units) diester of oleic acid, with an average of 4 ethylene oxide units per molecule. It functions primarily as an emulsifying agent and skin-conditioning agent in cosmetic formulations. PEG diesters are widely used because they allow fine-tuning of texture and skin feel. The 4-unit PEG chain is relatively short, which limits systemic absorption and reduces concerns about contamination byproducts compared to higher PEG esters. However, PEG-4 itself has been reviewed for potential developmental toxicity in animal studies at very high doses — not relevant to topical cosmetic use.
Skin benefits
- Effective emulsification
- Conditions and softens skin
- Improves product texture
Known concerns
- Minor concerns about PEG ethoxylation byproducts (1,4-dioxane, ethylene oxide) in low-quality formulations
- Mild irritant potential at high concentrations
References
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.