Science
Mechanism of Action
This polycationic polymer is characterized by its positive electrical charges, which enable it to selectively bind to the negatively charged sites present on the skin's outermost layer. This binding action facilitates the formation of a thin, cohesive film that actively draws moisture from the surrounding environment. Concurrently, this film acts as a physical barrier, significantly reducing transepidermal water loss and thereby augmenting the skin's moisture retention capabilities, resulting in a notably smoother feel.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Specific optimal pH parameters for Polyquaternium-13 are not extensively documented within the available research. However, other compounds within the polyquaternium class exhibit varying stability profiles across different pH ranges, suggesting potential pH sensitivity for this ingredient as well.
Conflicts
- Anionic surfactants: Due to its cationic nature, Polyquaternium-13 may form complexes with anionic surfactants, potentially leading to precipitation or reduced efficacy.
- Strong oxidizing agents: These may degrade the polymer structure. Certain metallic ions and surfaces, including iron, iron salts, steel, copper, copper alloys, and aluminum, have also been observed to cause incompatibilities with related polyquaterniums, suggesting a general caution.
Safety
Safety Profile
POLYQUATERNIUM-13 has not undergone a specific safety assessment by the Cosmetic Ingredient Review (CIR) Expert Panel. However, the CIR has reviewed numerous other polyquaternium compounds, such as Polyquaternium-6, -11, -22, and -39, and concluded them to be safe under current cosmetic use practices. No specific safety opinion from the Scientific Committee on Consumer Safety (SCCS) or direct food additive status from the FDA has been identified for this ingredient.
Your Skin
Skin Compatibility
Our Assessment
Verdict
While POLYQUATERNIUM-13 functions as a conditioning and film-forming agent, offering potential moisturizing benefits for dry skin, the absence of specific CIR safety reviews, clinical efficacy studies, and data on irritancy or comedogenicity currently limits its definitive recommendation for precision skincare formulations.
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