Science
Mechanism of Action
Polyquaternium-2 operates as a cationic surfactant and polymer, leveraging its positive charge to establish an electrostatic bond with the naturally negatively charged surface of the skin. This interaction leads to the formation of a subtle, protective film, which contributes to an improved skin texture and feel. Furthermore, its molecular structure supports humectant activity, drawing and retaining atmospheric moisture within the stratum corneum, thereby assisting in the reduction of transepidermal water loss.
Research
Clinical Evidence
Insufficient-data confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Polyquaternium-2 is optimally stable within a pH range of 7.0 to 8.5, which is characteristic of a 10% solution of the raw material.
Conflicts
- Can complex with certain anionic surfactants, which may lead to formulation incompatibilities or reduced efficacy.
Safety
Safety Profile
A specific Cosmetic Ingredient Review (CIR) assessment for Polyquaternium-2 is currently unavailable. General safety information indicates it is considered 'slightly hazardous' and an identified 'allergen', associated with hazard statement H317: 'May cause an allergic skin reaction.' This suggests a moderate risk of skin sensitization, particularly for individuals predisposed to allergic responses.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Despite its beneficial conditioning and humectant properties, the absence of a CIR safety review and explicit warnings about its allergenic potential make Polyquaternium-2 a questionable choice for precision skincare formulations due to moderate sensitization risk.
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References
Sources