Science
Mechanism of Action
As an amphiphilic molecule, Sorbitan Dioleate effectively reduces surface tension between immiscible oil and water phases, positioning itself at their interface to create stable emulsions and prevent coalescence. Its emollient properties mitigate transepidermal water loss, thereby boosting skin hydration and strengthening the natural barrier. The ingredient also acts as a wetting and dispersing agent, ensuring uniform distribution of insoluble components like pigments, and may facilitate the penetration of other active ingredients.
Research
Clinical Evidence
High confidence2-10%
Transparency
Dusting Analysis
Sorbitan Dioleate is a well-established and generally accepted ingredient in cosmetic formulations and is not typically associated with 'dusting' or significant controversy regarding its efficacy or safety at recommended concentrations.
The Formula
Formulation
Stability
Sorbitan Dioleate demonstrates optimal emulsifying capabilities within a pH range of 5.0 to 8.0 (neutral to mildly alkaline or acidic). It is susceptible to hydrolysis into sorbitol and oleic acid under extreme pH conditions (strong acids or bases), which can compromise its stability and may necessitate co-stabilizers. Careful storage is essential due to sensitivity to moisture and oxidation.
Synergies
- High-HLB emulsifiers (e.g., polysorbates) for robust oil-in-water emulsions
Conflicts
- Strong acidic conditions (pH < 5.0)
- Strong basic conditions (pH > 8.0)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed Sorbitan Dioleate as safe for use in cosmetics, consistent with other sorbitan esters, at concentrations reaching up to 25%. It is commonly used below 10%, a range associated with minimal to mild skin irritation risk and non-sensitizing properties. It is permitted in the EU and acknowledged by the FDA in specific applications.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Sorbitan Dioleate is a valuable ingredient, essential for its robust emulsifying capabilities and supportive emollient benefits, demonstrating a strong safety profile and broad skin compatibility.
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References
Sources