Science
Mechanism of Action
It acts by reducing the surface tension of water, allowing it to emulsify oils and debris for easy removal. On a molecular level, it can intercalate into the stratum corneum, potentially denaturing proteins and solubilizing essential skin lipids, which increases transepidermal water loss (TEWL) and enhances the penetration of other molecules.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 Induces measurable skin irritation under occlusive conditions.
- 02 24-hour exposure significantly increases TEWL and triggers reversible inflammatory responses.
- 03 Demonstrated significant comedogenic potential in animal models.
Transparency
Dusting Analysis
This ingredient is typically a primary surfactant rather than an active. However, use in leave-on products above 1% is a major red flag due to its high irritancy profile.
The Formula
Formulation
Stability
Stable in acidic conditions (pKa ~1.31) and generally exists in an anionic form; solutions typically maintain a pH below 7.0.
Synergies
- Ceramides
- Secondary mild surfactants (to stabilize micellar aggregates)
Conflicts
- Nitrosating agents (due to risk of N-nitroso compound formation)
- Cationic polymers
Safety
Safety Profile
Safe only when formulated to be non-irritating. It must not be used in systems where N-nitroso compounds can form. FDA guidelines suggest keeping concentrations below 1% for leave-on applications.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While a powerful cleanser, its high irritancy and comedogenicity ratings make it incompatible with barrier-first skincare philosophies.
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