Science
Mechanism of Action
This ingredient operates as a bridge between oil and water phases; its long C22-24 alkyl chain (Behenyl/Lignoceryl) anchors firmly into oil droplets while the 33-unit hydrophilic PEG chain extends into the water. By significantly reducing interfacial tension, it prevents emulsion separation and allows for the effective suspension of oils and impurities for easy removal during cleansing.
Research
Clinical Evidence
Medium confidence3%
Key findings
- 01 A 2012 CIR safety assessment of alkyl PEG ethers concluded that while undiluted material is an irritant, aqueous solutions up to 25% show only slight to moderate irritation, necessitating formulation at lower, non-irritating concentrations.
- 02 Clinical evaluations for antimicrobial and fragrance-stabilizing mixtures successfully utilized concentrations up to 5% without reports of adverse dermal reactions.
Transparency
Dusting Analysis
As a functional emulsifier and surfactant, this ingredient is used for structural integrity rather than marketing claims. It is rarely 'dusted' because its presence is required at specific concentrations to achieve emulsion stability.
The Formula
Formulation
Stability
Highly stable due to ether linkages which resist hydrolysis; it exhibits a high HLB of approximately 16.4. It remains stable across extreme pH ranges, though standard cosmetic use is optimized between 4.0 and 10.0.
Synergies
- Fragrance oils
- Lipophilic UV filters
- Low-HLB co-emulsifiers
Conflicts
- High electrolyte concentrations (may lower the cloud point)
- Strong oxidizing agents
Safety
Safety Profile
Safety is contingent on strict manufacturing controls to ensure residual impurities like 1,4-dioxane and ethylene oxide remain below 10 ppm.
Your Skin
Skin Compatibility
Our Assessment
Verdict
A highly stable and reliable emulsifier that provides essential structural integrity to sophisticated skincare textures without compromising skin barrier safety.
Related
Similar Ingredients
Finding similar ingredients…