Film Former
TOSYLAMIDE/FORMALDEHYDE RESIN
Safety score · 0–100
Caution
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A nail polish film former made with formaldehyde — a well-known contact allergen and IARC Group 1 carcinogen. Part of the 'toxic trio' many modern brands have removed in their 3-free and 5-free reformulations.
Function
Skin benefits
- Creates hard glossy film in nail polish
- Improves wear resistance
- Adds gloss and shine
Known concerns
- Made with formaldehyde — IARC Group 1 carcinogen
- Well-documented contact allergen — common cause of nail polish dermatitis
- Part of the nail polish 'toxic trio' avoided by 3-free and 5-free brands
- Sensitisation can develop with repeated exposure
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.