Science
Mechanism of Action
This nonionic surfactant effectively reduces interfacial tension between immiscible liquids, precisely enabling the creation and stabilization of oil-in-water or water-in-oil emulsions. Upon application, it forms a thin, protective film on the skin, which helps to minimize transepidermal water loss, thus contributing to improved skin moisture retention and barrier integrity. Furthermore, it functions as a wetting and dispersing agent, ensuring uniform distribution of pigments and mineral filters in complex formulations.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 Safety Assessment of Sorbitan Esters as Used in Cosmetics (CIR Expert Panel)
Transparency
Dusting Analysis
No specific data suggests that Sorbitan Sesquistearate commonly causes dusting or leaves a visible residue on the skin.
The Formula
Formulation
Stability
As a lipophilic, nonionic surfactant, Sorbitan Sesquistearate is critical for emulsion stability. Its emulsifying properties can be precisely modulated by adjusting its ratio with other emulsifiers (e.g., Span/Tween systems) to achieve desired HLB values, accommodating a diverse range of oils and waxes.
Synergies
- Other emulsifiers (e.g., Span, Tween) for HLB value optimization
Conflicts
- strong oxidizing agents
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that Sorbitan Sesquistearate, a derivative of sorbitol and stearic acid, is safe for use in cosmetic formulations. While generally considered non-toxic with a minimal risk of side effects and a low irritancy potential, it is important to note that a related ingredient, sorbitan sesquioleate, has been identified as a contact allergen in specific cases, particularly at concentrations of 20% or on dermatitic skin. Sorbitan Sesquistearate itself is typically used at concentrations less than 10%, with reported uses up to 25%.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Sorbitan Sesquistearate is a valuable ingredient, essential for stable emulsion creation and offering notable emollient benefits, with a strong safety profile and broad compatibility across skin types.
Related
Similar Ingredients
Finding similar ingredients…