Science
Mechanism of Action
Polyquaternium-55 operates as a positively charged, hydrophilic cationic polymer. Its mechanism involves electrostatic attraction to the inherently negatively charged areas of the skin, where it forms a thin, resilient, and heat-resistant polymeric film. This film demonstrably enhances the cosmetic elegance of formulations by improving slip and glide, while simultaneously functioning as a vital barrier to mitigate transepidermal water loss (TEWL), thereby promoting sustained skin hydration and a perceptibly smooth skin finish.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Demonstrated efficacy in concentrations of 0.5% to 2% for enhancing sensory experience, resulting in a silky and smooth skin feel. It improves product spreadability and glide, and has been shown to form a protective barrier on the skin, reducing transepidermal water loss and promoting hydration. A general recommended usage rate in final formulations for skincare products is between 0.1% and 0.5%.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Optimal stability and efficacy are observed within a pH range of 3.5 to 7.0. Formulations outside this specified range may experience degradation or a reduction in the ingredient's essential charge density, potentially compromising its performance.
Conflicts
- Strong sulfates may reduce the ingredient's deposition efficiency, potentially diminishing its intended benefits.
Safety
Safety Profile
While generally regarded as a low-risk and non-irritating cosmetic ingredient, a specific Cosmetic Ingredient Review (CIR) safety assessment providing a definitive 'safe as used' conclusion or a maximum concentration limit has not been identified.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Polyquaternium-55 is a valuable ingredient for enhancing the sensory experience and hydration in skincare formulations, forming a protective film on the skin.
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