Science
Mechanism of Action
As a polyoxyethylenated sorbitan ester, Polysorbate 61 functions by significantly reducing the surface tension of substances, enabling the formation and stabilization of emulsions. This allows oil components to be effectively dispersed within water-based formulations, maintaining product homogeneity.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Polysorbate 61, an oil-in-water emulsifier with an HLB value of 9.6, is soluble in ethanol, ethyl acetate, and toluene, and dispersible in water. It is susceptible to degradation via oxidation and hydrolysis, which can lead to peroxide formation and a reduction in solution pH. Stability is compromised by high temperatures, light exposure, and the presence of transition trace metals. Maintaining an optimal pH range is essential, and chelating agents like EDTA can mitigate metal-catalyzed degradation.
Conflicts
- Trace metals (can catalyze oxidation)
- Certain buffer components (e.g., histidine, can catalyze degradation)
- High temperatures
- Light exposure
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded Polysorbate 61 to be safe as a cosmetic ingredient within current usage practices and concentrations, provided it is formulated to be nonirritating. This aligns with its permitted use under the European Union's Cosmetics Regulation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Polysorbate 61 is a valuable nonionic surfactant and emulsifier, widely used for its ability to stabilize formulations and blend immiscible ingredients, with a robust safety profile from regulatory bodies when formulated appropriately.
Related
Similar Ingredients
Finding similar ingredients…
References
Sources