Science
Mechanism of Action
As a surfactant with an exceptionally high Hydrophilic-Lipophilic Balance (HLB) of approximately 24, Ceteareth-55 reduces interfacial tension between oil and water phases. Its molecular structure—comprising 55 units of ethylene oxide—allows it to effectively encapsulate oils, fragrances, and debris, facilitating both the stability of emulsions and the efficient removal of impurities during the cleansing process.
Research
Clinical Evidence
High confidence1.5%
Key findings
- 01 Demonstrated minimal irritation potential in both short-term (4-day) and cumulative (21-day) patch testing protocols.
- 02 Categorized as a minimal irritant even at elevated concentrations following single-exposure dermal testing.
Transparency
Dusting Analysis
Ceteareth-55 is a functional excipient rather than an active ingredient; its presence at low percentages is typically indicative of its role as a solubilizer for fragrances or specific lipids rather than marketing 'dusting'.
The Formula
Formulation
Stability
Exhibits superior stability in electrolyte-dense environments and remains robust across a broad pH spectrum, though extreme alkalinity may trigger hydrolysis over extended periods.
Synergies
- Lipophilic vitamins
- Essential oils
- Non-polar emollients
Conflicts
- Strong oxidizing agents
- Strong acids at high temperatures
Safety
Safety Profile
While safe for general use, it should be avoided on compromised or broken skin to prevent potential absorption of PEG components. Purity is maintained via vacuum stripping to keep 1,4-dioxane levels below 1 ppm.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A highly reliable and versatile stabilizer essential for creating elegant, uniform textures in precision skincare formulations.
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References
Sources