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Moumoujus

CHITOSAN PCA.

Valuable CAS 117522-93-7 / FILM FORMING, HUMECTANT, SKIN CONDITIONING

A high-performance cationic polymer that fuses the structural benefits of Chitosan with the intensive hydrating properties of Pyrrolidone Carboxylic Acid (PCA). This biotech-derived ingredient acts as a bio-adhesive moisture reservoir, creating a breathable biological film that enhances skin elasticity and antimicrobial resilience.

Summary

Humectant Film Former Skin Conditioning Agent Antimicrobial Support Lifting Agent

Science

Mechanism of Action

As a positively charged (cationic) molecule, Chitosan PCA electrostatically anchors itself to the skin's naturally negative surface. This bond forms a semi-permeable matrix that significantly curbs transepidermal water loss (TEWL) while its PCA component actively draws atmospheric moisture into the stratum corneum. Simultaneously, its ionic nature interacts with and disrupts the cell membranes of opportunistic bacteria, providing a secondary layer of protection.

Research

Clinical Evidence

High confidence
Effective range 0.1–8%
Optimal

5%

Key findings

  1. 01 Clinical evaluation demonstrated that a 3.0% to 5.0% concentration increases skin hydration levels by up to 140% within an 8-day treatment window.
  2. 02 In vitro testing showed a reduction in bacterial proliferation exceeding 90% at concentrations as low as 0.1% to 1.0%.
  3. 03 Usage at 5.0% to 8.0% provides a measurable, immediate skin-tightening and lifting effect through the formation of a high-tension polymer film.

Transparency

Dusting Analysis

Commonly dusted
Min. effective
3%
Red flag below
0.5%

Because Chitosan PCA offers antimicrobial benefits at 0.1%, many brands include it at trace levels to claim 'multifunctional' benefits. However, to achieve the clinically validated 140% hydration boost or the immediate lifting effect, concentrations must reach 3.0% and 5.0% respectively. Formulas containing less than 1.0% are likely leveraging it for preservation or label appeal rather than structural skin improvement.

The Formula

Formulation

Solubility
Water
Optimal pH 3.5 – 6
0 7 14

Stability

Optimal stability and cationic activity are maintained in acidic to slightly acidic environments. Formulations must be processed below 40°C to ensure polymer integrity.

Synergies

  • Lactic Acid
  • Glycerin
  • Non-ionic surfactants

Conflicts

  • Carbomers
  • Xanthan Gum
  • Anionic surfactants
  • Alginates
  • N-nitrosating agents

Safety

Safety Profile

CIR Status
Safe as used
Max tested
8%
Pregnancy
Safe
Sensitization risk Low

Safe for topical use; however, it should not be paired with N-nitrosating agents to prevent the theoretical formation of nitrosamines.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

An exceptional multi-tasker for precision hydration and lifting, provided it is formulated in a compatible acidic environment without anionic thickeners.

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