Science
Mechanism of Action
This copolymer forms a thin, often transparent, film on the skin's surface upon application. This film acts as a physical barrier, which can help to reduce transepidermal water loss and offer a degree of protection from environmental aggressors.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
Unmodified glyphthalic resins (glycerol-phthalic acid polymers) typically exhibit poor solubility and are incompatible with vegetable oils. Their solubility, either in alcohol or water, is dependent on the degree of polycondensation. Related polyesters demonstrate degradation in basic solutions (pH 7.14-9.16) but maintain integrity in acidic solutions (pH 1.70-5.80) at room temperature, indicating a preference for acidic formulation environments.
Conflicts
- vegetable oils (for unmodified forms)
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has not specifically reviewed GLYCERIN/PHTHALIC ACID COPOLYMER. However, glycerin, a constituent, has been deemed safe for cosmetic use. The ingredient's presence in the FDA's Inventory of Food Contact Substances (CAS Reg. No. 29012-39-3) suggests a level of safety for specific non-dermal applications.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Due to the absence of dedicated clinical research validating its efficacy in cosmetic applications and a specific CIR safety assessment for skincare use, the full profile of GLYCERIN/PHTHALIC ACID COPOLYMER remains largely undefined.
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