Science
Mechanism of Action
As a lipophilic agent with an HLB value of approximately 7, Ceteareth-3 reduces interfacial tension to help blend oil and water phases, specifically favoring water-in-oil (W/O) structures. Additionally, it acts as a mild penetration enhancer by momentarily modifying the lipid organization of the stratum corneum to improve the delivery of active ingredients.
Research
Clinical Evidence
High confidence5%
Key findings
- 01 Evaluations of related Ceteareth compounds demonstrated minimal irritation over 21 days and confirmed a lack of sensitization in repeated insult patch tests.
- 02 A specific case study highlighted a rare instance of contact dermatitis, suggesting that while generally safe, sensitization can occur in isolated predisposed individuals.
Transparency
Dusting Analysis
Ceteareth-3 is a functional texture enhancer rather than a primary active; it is rarely 'dusted' because its inclusion is dictated by the emulsification requirements of the specific formula.
The Formula
Formulation
Stability
Highly resilient across a broad pH spectrum, though a slight pH drop may occur during extended storage. It remains stable and effective as long as the environment stays above pH 4.0.
Synergies
- Oil-in-water co-emulsifiers
- Lipid-based actives
- Non-ionic surfactants
Conflicts
- Strong oxidizing agents
- Phenolic preservatives
Safety
Safety Profile
While safe for general use, products containing Ceteareth-3 should not be applied to severely damaged or broken skin due to potential systemic absorption concerns associated with polyethylene glycol derivatives.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A reliable and versatile emulsifier that ensures formula stability while subtly enhancing the efficacy of accompanying active ingredients.
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References
Sources