Tosylamide/Formaldehyde Resin
AKA “Tosylamide Formaldehyde Resin, Nail Polish Resin”
Ingredient
Ingredient Facts
Tosylamide/formaldehyde resin
AKA: Tosylamide Formaldehyde Resin, Nail Polish Resin
Ingredient · Film Forming · EWG: 4
Plant-Derived Synthetic
Occlusive
Not Clean
Benzenesulfonamide, 4-methyl-, polymer with formaldehyde
CAS #
25035-71-6
See origin →
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Plasticiser
Anti-Inflammatory
Moisturizing
Fights Acne
Creates protective layer
Adds flexibility
Traditional Use
Developed in the early 20th century as a synthetic film-forming agent. First used in nail polishes in the 1920s to create a hard, glossy finish and improve wear resistance.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
No
Allergen Warning
⚠️ Formaldehyde
EWG
4
CIR
Safe as used
Pregnancy
No
Restricted By
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Agencies
Tosylamide/Formaldehyde Resin
European Commission
EU Cosmetic Ingredient Database (CosIng)
Tosylamide/Formaldehyde Resin
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Tosylamide formaldehyde resin.
Stechschulte SA, Avashia N, Jacob SE
Dermatitis : contact, atopic, occupational, drug, 2008
Verified Jun 2026
Data: CosIng · EWG · CIR