Ceteareth-20 is a synthetic, non-ionic surfactant created by ethoxylating cetearyl alcohol (a blend of cetyl and stearyl alcohol) with approximately 20 moles of ethylene oxide. Its dual affinity — lipophilic and hydrophilic — makes it a dependable emulsifier and solubilizing agent, helping oil and water mix seamlessly in O/W cosmetic systems.
In skincare, Ceteareth‑20 functions as both an emulsifier and a texturizer. It stabilizes creams and lotions, contributing to a smooth and uniform formula, while enhancing skin feel and aiding the distribution of actives. In haircare, it offers added conditioning and moisturizing benefits to the scalp and strands, promoting shine, manageability, and hydration. It improves deposition of actives and texture in conditioners and styling formulations.
Quick Insights
Ingredient Rating:
GOOD
Type of Ingredient:
Texture Enhancer, Emulsifier and Solvent
Intended Function:
To emulsify oil and water phases, stabilize formulas, improve texture and sensorial feel, and facilitate delivery of actives in both skincare and haircare products.
Common Applications:
Found in oil‑in‑water creams, lotions (especially sprayable), foundations, serums, sunscreen, hair conditioners, masks, and styling products — essential for stable, pleasant formulations.
Target Audience:
Manufacturers and brand owners seeking robust, efficient emulsifiers to enhance formulation stability, sensory richness, and ingredient solubilization for a wide range of personal care products.
Also Known As:
Polyoxyethylene (20) Cetyl/Stearyl Ether, PEG‑20 Cetyl/Stearyl Ether, Polyethylene Glycol 1000 Cetyl/Stearyl Ether.
Safety Analysis
Regulatory Safety Assessment:The Cosmetic Ingredient Review (CIR) panel has evaluated Ceteareth‑20 (among other Ceteareth homologues) and found it safe for use in cosmetics applied to intact skin, although it should not be used on damaged skin due to potential irritation and concerns over PEG-related systemic effects on burn patients.
Impurity Risks: Ethoxylation can introduce trace contamination with harmful by‑products like ethylene oxide and 1,4‑dioxane. Regulatory bodies and CIR acknowledge the risk, but emphasize that proper purification during manufacturing controls this hazard.
Hazard Ratings: The Environmental Working Group (EWG) rates Ceteareth‑20 with moderate concern “Fair”, noting low irritation or toxicity but elevated contamination concerns. Still, adherence to industry‑approved purification and regulatory standards mitigates most of these issues.
References
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