Science
Mechanism of Action
Operating primarily as a film-forming agent, this copolymer creates a smooth, continuous layer upon application to skin, hair, or nails. This physical barrier can contribute to improved texture and, in related applications such as nail products, enhance properties like shine, strength, and resistance to chipping.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel noted in their 2016 assessment that data for this specific copolymer were insufficient to determine its safety in cosmetic formulations, as it was not reported to be in current use. A closely related copolymer, 'Adipic Acid/Neopentyl Glycol/Trimellitic Anhydride Copolymer' (lacking CHDM/MA), was deemed safe for nail products but also had insufficient data for other cosmetic applications. There is a documented potential for allergic reactions and skin/eye irritation, with similar copolymers linked to contact dermatitis. The CIR specifically highlighted the need for further data regarding molecular weight, residual monomer impurities, metabolism, dermal absorption, genotoxicity, reproductive toxicity, and irritation/sensitization at maximum leave-on concentrations. While the EWG generally rates similar copolymers low for cancer and developmental toxicity, the specific concerns raised by the CIR for this compound remain pertinent.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Due to a significant lack of specific safety data and unconfirmed cosmetic use for skin, the inclusion of this copolymer in precision skincare formulations is currently not recommended.
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