Science
Mechanism of Action
The polymer forms a robust 3D network that swells significantly when neutralized, effectively entrapping oil and water droplets to stabilize emulsions. Its shear-thinning behavior ensures a smooth, easy spread upon application, while viscosity is restored at rest.
Research
Clinical Evidence
High confidenceN/A
Key findings
- 01 Formulations containing 0.6% demonstrated non-irritating and non-sensitizing properties in human repeat insult patch tests.
- 02 General testing up to 2.0% in formulations indicates dermal safety, despite weak sensitization observed in some aqueous dilutions.
- 03 A 30.0% concentration in olive oil was found to be non-irritating to the skin, though direct eye contact with high concentrations can cause moderate irritation.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Maximum thickening and clarity are typically achieved at pH 5.0–5.5. It requires neutralization with a base (e.g., NaOH, TEA) to properly uncoil the polymer chains and form a gel.
Conflicts
- High concentrations of electrolytes/salts (can cause viscosity loss)
- Strongly acidic environments (below pH 4.0)
- Cationic surfactants/ingredients
Safety
Safety Profile
The CIR Expert Panel concluded it is safe when formulated to be non-irritating. Modern manufacturing practices mitigate previous concerns regarding benzene as a polymerization solvent.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This ingredient is valuable for formulating stable, smooth-textured products across all skin types due to its rheology modifying and emulsifying properties, with a strong safety profile.
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References
Sources