Science
Mechanism of Action
As an anionic surfactant, it reduces water's surface tension, forming micelles to capture and rinse away oils and dirt. The ammonium cation limits deep skin penetration, making it slightly milder than some other sulfates.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 Cosmetic Ingredient Review (CIR) Safety Assessment of Alkyl Sulfates (2010/2014)
- 02 EPA Inert Reassessment: Alkyl Sulfates (2006)
Transparency
Dusting Analysis
No data suggests this ingredient is commonly dusted for marketing purposes.
The Formula
Formulation
Stability
Stable in slightly acidic to neutral pH ranges (5.0-7.0), but prone to hydrolysis at very low pH. It exhibits greater stability in alkaline conditions compared to its sodium counterparts.
Conflicts
- Cationic surfactants (forms insoluble complexes)
- Strongly acidic environments
- Highly concentrated electrolyte solutions (can cause salting out)
Safety
Safety Profile
Deemed safe for rinse-off products up to 29% concentration. For leave-on applications, concentrations should be kept below 1% to prevent irritation, and it is not considered a sensitizer.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This ingredient is a valuable cleansing agent for rinse-off products, offering effective performance and a good safety profile within recommended concentrations.
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