Science
Mechanism of Action
This ingredient functions by significantly lowering water's surface tension, enabling hydrophobic substances such as oils and dirt to mix with water for efficient removal from the skin and hair. As an emulsifier, it stabilizes formulations by promoting the formation of stable emulsions between typically immiscible oil and water phases.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The ingredient demonstrates stability in alkaline, weak acid, and hard water conditions, contributing to good viscosity and thickening in formulations. However, it is prone to hydrolysis and instability in strong acidic environments and may exhibit yellowing over time.
Conflicts
- Strong acids
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel concluded that Sodium C12-13 Pareth Sulfate is safe for cosmetic use under current practices, provided the final product is formulated to be non-irritating. Trace amounts of 1,4-dioxane, a manufacturing by-product and probable carcinogen, may be present; however, levels below 30ppm are generally accepted, and the U.S. FDA indicates monitored levels do not pose a consumer hazard. The presence of Triethanolamine (TEA) raises concerns regarding potential nitrosamine formation, which is subject to stringent regulations by bodies such as the SCCS and EU Cosmetics Directive.
Your Skin
Skin Compatibility
Our Assessment
Verdict
SODIUM/TEA C12-13 PARETH-3 SULFATE is a valuable anionic surfactant for cleansing and emulsifying, offering broad compatibility across skin types but requiring careful formulation to ensure non-irritancy and mitigate specific impurity concerns.
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References
Sources