What it is
Tosylamide/Formaldehyde Resin, also called Toluenesulfonamide/Formaldehyde Resin, is a soft resin made with Toluenesulfonamide and Formaldehyde.
What it does
Tosylamide/Formaldehyde Resin is used in nail polishes to make them tough and resilient, shiny and longlasting.
While it is true that Formaldehyde is toxic and carcinogenic, Tosylamide/Formaldehyde Resin is considered to be safe. That’s because the chemical process used to make this resin completely changes the structure of Formaldehyde so that it is present in very minimal concentrations (usually 0.2%) or even not at all. However, this resin can cause allergies in some people.