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Moumoujus

POLYQUATERNIUM-11.

Valuable CAS 53633-54-8 / ANTISTATIC, FILM FORMING

Polyquaternium-11 is a sophisticated cationic polymer known for its exceptional film-forming and conditioning properties. It actively creates a protective, positively-charged barrier on the skin's surface, visibly contributing to enhanced smoothness, softness, and improved hydration.

Summary

Film-forming Antistatic Conditioning Lubricant

Science

Mechanism of Action

This ingredient functions through its cationic nature, possessing positive charges that readily form an electrostatic bond with the inherently negatively charged surface of the skin. Upon application, it constructs a lightweight, breathable, and protective film. This barrier is instrumental in minimizing transepidermal water loss (TEWL) and shielding the skin from environmental aggressors, thereby promoting a refined texture and a more conditioned skin feel.

Research

Clinical Evidence

Medium confidence
Effective range ≤2.9%
Optimal

N/A

Key findings

  1. 01 No sensitization, minimal transient irritation, no phototoxicity/photoallergenicity.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 4 – 7
0 7 14

Stability

Polyquaternium-11 demonstrates robust stability across normal temperatures and pressures, and maintains its efficacy and structure even when exposed to elevated heat.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
50%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has definitively concluded that Polyquaternium-11 is safe for use in cosmetics under current practices. The stated maximum concentration of 50% pertains to the commercial raw ingredient, which is typically supplied as a solution. In practice, the actual polymer concentration within formulated cosmetic products is considerably lower; for leave-on applications, reported use concentrations were up to 2.9% in 2023. A single 24-hour patch test with a 9.5% solution showed slight skin irritation in 1 out of 19 subjects, though repeated tests at much higher concentrations did not indicate sensitization. Any trace amounts of unreacted vinylpyrrolidone monomer are considered biologically insignificant and nonmutagenic. This ingredient is compliant with the general provisions of the Cosmetics Regulation of the European Union.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

Polyquaternium-11 is a valuable ingredient for enhancing skin conditioning, barrier function, and overall skin feel, exhibiting excellent safety and compatibility across all skin types.

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