Science
Mechanism of Action
This ingredient acts as a synthetic anionic surfactant, lowering the surface tension of water to facilitate the dispersion and mixing of oil and water. This property allows it to efficiently dissolve grease and dirt, effectively cleansing skin, hair, and teeth, while also providing high degreasing, wetting, and foaming capabilities.
Research
Clinical Evidence
Low confidenceN/A
Key findings
- 01 Irritating (observed for Sodium C14-16 olefin sulfonate, a chemically similar ingredient).
- 02 Non-irritating in some studies (observed for Sodium C14-16 olefin sulfonate).
- 03 Irritating in some studies (observed for Sodium C14-16 olefin sulfonate).
Transparency
Dusting Analysis
This ingredient presents a risk of skin irritation, particularly at elevated concentrations. The CIR Expert Panel advises a maximum concentration of 2% for leave-on products. Studies on a similar compound, Sodium C14-16 olefin sulfonate, indicated eye irritation at 10% and dermal irritation in rabbits when concentrations exceeded 38-40%. Its potent degreasing action also suggests a potential for skin barrier disruption if not used judiciously.
The Formula
Formulation
Stability
Aqueous solutions are stable up to 100 °C. The ingredient maintains its effectiveness even in challenging conditions, such as hard water environments.
Safety
Safety Profile
The CIR Expert Panel has deemed Sodium α-Olefin Sulfonates (including similar ingredients) safe for rinse-off products and for leave-on products at concentrations up to 2%. While EWG Skin Deep lists low concerns for carcinogenicity, allergies, immunotoxicity, and reproductive toxicity, it highlights a potential for skin irritation, especially for sensitive skin. The EU Ecolabel program notes high chronic and acute aquatic toxicity, stating it is readily biodegradable but not anaerobically degradable.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While offering strong cleansing and foaming properties for rinse-off products, the restriction to 2% in leave-on formulations, potential for skin irritation (particularly for sensitive skin), and environmental toxicity concerns make this ingredient a questionable choice for precision skincare applications.
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