Science
Mechanism of Action
By incorporating sulfoisophthalate units, this polymer gains increased hydrophilicity, allowing it to interact more readily with water. In cosmetic formulations, its polymeric structure can contribute to film formation, modify viscosity, or enhance the overall texture of the product by acting as a bulking agent or providing structural support.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The presence of sulfoisophthalate units may reduce thermal and hydrolytic stability when compared to unmodified PET. However, saponification reactions in similar compounds have been observed in an alkaline pH range (pH 8 to 10) at elevated temperatures (50 to 80°C), suggesting a degree of tolerance to alkaline conditions, though a precise optimal pH range for cosmetic stability is not defined.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed modified terephthalate polymers, including this one, safe for use in cosmetics. This assessment is based on their analogy to polymers utilized in surgical sutures and other medical devices, where the FDA has found safety data adequate. Systemic exposure from cosmetic application is considered less than that from medical devices, reinforcing its safety profile.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This polymer is deemed safe for cosmetic use and can be a valuable formulation aid for enhancing texture and modifying viscosity, though specific skin efficacy data is not yet available.
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References
Sources