Science
Mechanism of Action
As a polyethylene glycol ether of stearic acid, STEARETH-13 operates by significantly reducing the interfacial tension between disparate phases, such as oil and water. This crucial action facilitates the formation and stability of emulsions, thereby preventing product separation and maintaining formula consistency. Its surfactant properties further contribute to cleansing by emulsifying oils, fats, and particulate matter, enabling their efficient removal from the skin.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 Clinical reviews, based on read-across from Steareth-2 and -10, indicate these related ingredients exhibited at most mild irritation to eyes and skin when tested in aqueous solutions and cosmetic formulations.
- 02 Related Steareth-20 was found to be nontoxic when applied dermally in subchronic safety assessments.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Based on similar ethoxylated fatty alcohols, STEARETH-13 is expected to exhibit good stability across a pH range of 5.0 to 7.0 for aqueous solutions. Related ingredients like Steareth-20 are recognized for exceptional stability and tolerance to extreme pH conditions.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed Steareth ingredients, including STEARETH-13, safe for use when formulated to be non-irritating. Small, controllable amounts of 1,4-dioxane, a byproduct of the ethoxylation process, may be present and are typically managed through purification. Its use aligns with the general provisions of the European Union's Cosmetics Regulation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
STEARETH-13 is an essential ingredient for modern skincare, critically supporting emulsion stability and enhancing cleansing efficacy, with a strong safety profile when properly formulated.
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Similar Ingredients
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References
Sources