Science
Mechanism of Action
As a zwitterionic molecule with a C22 behenyl tail, it works by forming mixed micelles with harsher anionic surfactants. This process increases the overall size of the micelles, preventing them from penetrating the skin barrier and significantly reducing the irritation potential of the cleansing system. Additionally, its long-chain structure deposits a microscopic, non-greasy lubricating film that provides antistatic and conditioning benefits.
Research
Clinical Evidence
High confidence3%
Key findings
- 01 Safety assessments by the CIR (2012) established a 3.0% maximum active concentration for leave-on products to mitigate sensitization risks from manufacturing by-products.
- 02 Ocular and dermal testing on animal models using a 10% active solution (pH 6.1) demonstrated a Primary Irritation Index (PII) of 0.25, classifying it as non-irritating.
Transparency
Dusting Analysis
Because it is often used as a secondary surfactant or a co-emulsifier, it is rarely 'dusted' at purely symbolic levels. However, in leave-on products, concentrations exceeding 3% active matter may indicate a lack of adherence to safety guidelines regarding potential impurities.
The Formula
Formulation
Stability
Highly stable across a wide pH range and compatible with anionic, cationic, and non-ionic systems, making it a versatile choice for complex '2-in-1' textures.
Synergies
- Sodium Laureth Sulfate
- Sodium Cocoyl Isethionate
- Glycerin
Safety
Safety Profile
While safe for rinse-off use at various levels, leave-on formulations are restricted to 3.0% to prevent potential sensitization from DMAPA or amidoamine impurities.
Your Skin
Skin Compatibility
Our Assessment
Verdict
An excellent secondary surfactant for creating high-performance, low-irritation cleansers that leave a tangible conditioning effect on the skin.
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References
Sources