Science
Mechanism of Action
It functions by reducing water's surface tension, allowing it to lift and remove impurities from the skin. While ethoxylation mitigates some harshness compared to non-ethoxylated sulfates, high concentrations can still disrupt the skin's lipid barrier.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Studies indicate it can be an irritant in patch tests at concentrations of 2% and greater, with irritation increasing proportionally with concentration.
- 02 A safety assessment recommended concentrations not exceed 1% for leave-on products to prevent irritation.
Transparency
Dusting Analysis
This ingredient is not typically associated with dusting in cosmetic formulations due to its liquid or paste nature and primary role as a surfactant.
The Formula
Formulation
Stability
Highly stable in acidic to neutral conditions (pH 4.0-7.0). Extreme low pH can cause sulfate hydrolysis, while high pH may lead to ammonia release.
Conflicts
- Cationic polymers (may form insoluble complexes/precipitates)
- Strongly alkaline ingredients
- Quaternary ammonium compounds
Safety
Safety Profile
Deemed safe in cosmetics when formulated to be non-irritating. The CIR recommends it for brief, discontinuous use with thorough rinsing, with leave-on products ideally not exceeding 1%.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An effective cleansing agent, Ammonium Laureth-7 Sulfate is best utilized in rinse-off formulations at appropriate concentrations to minimize its irritation potential.
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References
Sources