Science
Mechanism of Action
As a cationic polymer, Polyquaternium-27 carries a positive charge, enabling it to ionically bond with the negatively charged surface of the skin. This interaction creates a thin, cohesive film that delivers conditioning effects, aids in moisture retention by acting as a protective barrier, and contributes to improved skin texture. Like some other polyquaterniums, it may also function as a humectant, attracting environmental moisture to the skin.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Polyquaternium-27 is a block copolymer of Polyquaternium-2 and Polyquaternium-17, known for its water solubility. While a specific optimal pH range is not detailed, many polyquaterniums demonstrate stability across a broad pH spectrum.
Conflicts
- Strong oxidizing agents
- Iron and iron salts
- Steel
- Copper
- Copper alloys
- Aluminum
- Some anionic surfactants (potential for complex formation and film buildup in certain formulations)
Safety
Safety Profile
Although Polyquaternium-27 itself has not been individually assessed by the CIR Expert Panel, related polyquaterniums (e.g., Polyquaternium-6, -11, -22, -39) have been reviewed and generally concluded to be safe for cosmetic use. The large molecular size typical of these polymers is understood to limit dermal absorption, thereby minimizing systemic toxicity.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Polyquaternium-27 is a valuable conditioning and film-forming polymer for skin formulations, leveraging a well-understood mechanism of action and a favorable safety profile inferred from similar polyquaterniums.
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