Science
Mechanism of Action
As an amphiphilic molecule, Ceteareth-7 reduces interfacial tension between oil and water phases, allowing for the creation of uniform droplets that resist coalescence. On the skin's surface, it performs a dual role by acting as a light emollient, filling micro-gaps in the stratum corneum to improve tactile smoothness while facilitating gentle cleansing.
Research
Clinical Evidence
High confidence1.5%
Key findings
- 01 Technical assessments demonstrate that concentrations between 0.5-5% successfully stabilize complex O/W milks and lotions, even when formulated alongside reactive agents like hydrogen peroxide.
- 02 Clinical patch testing of related alkyl PEG ethers confirms that concentrations up to 1.5% result in minimal irritation and zero sensitization over 21-day observation periods.
Transparency
Dusting Analysis
Ceteareth-7 is a functional structural ingredient rather than a marketing active. It is rarely 'dusted' because its primary purpose is emulsion stability; failure to include it at functional levels (typically above 0.5%) would result in visible formula separation.
The Formula
Formulation
Stability
Exhibits exceptional stability across a broad pH spectrum and maintains performance in the presence of electrolytes and reactive hair-processing chemicals.
Synergies
- Hydrogen peroxide
- Ammonium thioglycolate
- Cetearyl alcohol
Conflicts
- Strong oxidizing agents
- Excessively high salt concentrations
Safety
Safety Profile
The CIR Expert Panel confirmed safety for cosmetic use; historical concerns regarding PEG absorption through damaged skin were officially dismissed for standard cosmetic concentrations in 2011.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An essential and robust non-ionic emulsifier that ensures the structural integrity of lightweight, fluid skincare while maintaining a high safety profile for all skin types.
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References
Sources