Film Former
TRIMETHYLPENTANEDIOL/ISOPHTHALIC ACID/TRIMELLITIC ANHYDRIDE COPOLYMER
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A polyester film-former built on isophthalic acid and trimellitic anhydride. Useful for hard, glossy films, but residual anhydride monomer is a documented skin and respiratory sensitizer.
Function
Skin benefits
- Forms hard, durable films (used in long-wear nail and hair products)
- Improves wear and gloss
- Stabilizes pigment dispersions
Known concerns
- Trimellitic anhydride is a known respiratory and skin sensitizer
- Residual unreacted anhydride raises sensitization risk
- Better-tolerated polyester film-formers exist
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Related film formers
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.