Science
Mechanism of Action
This ingredient functions by forming a coherent polymeric film across the targeted surface (skin, hair, or nails). This film contributes to the product's performance by providing textural enhancement, fixation, and a physical barrier.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The acidic character of a key component, sodium 5-sulfo-isophthalic acid (Na-SIPA), can lead to an increase in diethylene glycol (DEG) formation through acid-catalyzed etherification and may exacerbate titanium dioxide (TiO2) agglomeration during manufacturing.
Conflicts
- acidic conditions
Safety
Safety Profile
While this specific copolymer has not undergone a dedicated review by the Cosmetic Ingredient Review (CIR) Expert Panel, analogous terephthalate polymers have been evaluated and deemed safe by the FDA for use in medical devices (e.g., surgical sutures) and as food contact substances, where systemic exposure levels are expected to significantly surpass those from cosmetic applications. EWG Skin Deep assessments indicate low concerns for carcinogenicity, allergic reactions, immunotoxicity, and developmental/reproductive toxicity.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This copolymer is a valuable functional ingredient primarily used in hair care for its film-forming and hair-fixing properties, with a generally low irritancy and favorable safety profile.
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References
Sources