Science
Mechanism of Action
As a non-ionic surfactant with a low Hydrophilic-Lipophilic Balance (HLB) of approximately 4.5–4.9, it stabilizes water-in-oil (W/O) emulsions. It works by anchoring itself into the oil phase, facilitating the even dispersion of emollients and improving the spreadability of dense cosmetic bases.
Research
Clinical Evidence
High confidence1.5%
Key findings
- 01 Safety assessments by the CIR indicate that concentrations up to 5% are non-toxic for standard topical applications.
- 02 Patch testing at 1.35%–1.5% demonstrated that the ingredient is non-sensitizing and causes negligible irritation over both short-term (4-day) and cumulative (21-day) exposure.
Transparency
Dusting Analysis
Ceteareth-2 is a functional excipient rather than an active; however, it must be used at 1% or higher to effectively stabilize the emulsion. Levels below 0.5% are generally insufficient for its primary structural role.
The Formula
Formulation
Stability
Exhibits excellent electrolyte tolerance and remains highly stable in balanced emulsions; however, it is susceptible to hydrolysis in highly alkaline environments.
Synergies
- Thick waxes
- Mineral oils
- Heavy emollients
Conflicts
- Strong acids
- Strong bases
- Extreme pH environments
Safety
Safety Profile
Should not be applied to severely damaged or burnt skin to avoid potential systemic absorption of PEG-related components. Formulation must utilize purified grades to ensure 1,4-dioxane levels are controlled.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An essential structural component for creating stable, rich emulsions for dry and sensitive skin, though it may be too heavy for oily skin types.
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