Nail Productmedium risk Common irritant
Tosylamide
INCI · Tosylamide/Formaldehyde Resin
Used in nail polish to improve adhesion. Common nail allergen.
Why dermatologists flag it
Formaldehyde-containing resin - common nail allergen
Names to look for on labels
Tosylamide appears under any of these names — manufacturers choose between INCI, common, and local-language terms freely.
Tosylamide/Formaldehyde ResinTSF ResinToluenesulfonamide Formaldehyde Resinटोसाइलामाइड
Common product categories
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