Film Former
GUANIDINE CARBONATE/HDI ISOCYANURATE TRIMER/MDI CROSSPOLYMER
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A urethane crosspolymer made from MDI and HDI isocyanates. The cured polymer is inert; risk hinges on residual unreacted isocyanate monomers, which are strong sensitizers.
Function
Skin benefits
- Forms long-wear film for nail and hair styling
- Provides flexible, water-resistant network
Known concerns
- Made from MDI/HDI isocyanate monomers — strong sensitizers if unreacted
- Skin and respiratory sensitization risk during manufacture
- Limited cosmetic-specific safety review
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.