Science
Mechanism of Action
By reducing interfacial tension between oil and water, Ceteareth-30 acts as a protective colloid that prevents phase separation. In synergy with fatty alcohols, it organizes into lamellar liquid-crystalline phases which mimic the skin's natural lipid bilayer, effectively trapping moisture and improving the delivery profile of the formulation.
Research
Clinical Evidence
High confidence3%
Key findings
- 01 In a randomized, double-blind trial (EDIT study), Ceteareth-30 at 1-5% was validated as a safe, non-irritating base for treating severe cutaneous dryness and uremic pruritus.
- 02 Clinical in-vivo research indicates that at 3%, its high HLB value (16-17) can modulate the penetration depth of polar actives like flavonoids, potentially keeping them in targeted upper skin layers.
Transparency
Dusting Analysis
As a functional emulsifier, Ceteareth-30 is rarely 'dusted' for marketing; it is typically used at 1-5% to ensure emulsion stability. Levels below 0.5% in a high-oil formula may indicate a secondary stabilizer rather than the primary emulsifier.
The Formula
Formulation
Stability
Highly resilient to electrolytes and maintains stability across a vast pH range. Requires heating to 70-80°C for proper integration into the oil phase.
Synergies
- Fatty alcohols (Cetyl/Stearyl Alcohol)
- Electrolyte-heavy actives
- Mineral UV filters
Conflicts
- Strong oxidizing agents
- Strong acids
Safety
Safety Profile
While safe for general use, it should be avoided on severely damaged or burned skin due to potential PEG-related kidney toxicity risk in those specific medical contexts.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An exceptionally stable and safe emulsifier that provides superior texture and barrier support for all skin types.
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References
Sources