Toluenesulfonamide/Formaldehyde Resin
AKA “Tosylamide/formaldehyde resin, TSF resin, Toluene sulfonamide formaldehyde
Ingredient
Ingredient Facts
Toluenesulfonamide/formaldehyde resin
AKA: Tosylamide/formaldehyde resin, TSF resin, Toluene sulfonamide formaldehyde
Ingredient · Film Forming · EWG: 4
Plant-Derived Synthetic
Occlusive
Not Clean
Toluenesulfonamide/Formaldehyde Resin is a cosmetic ingredient. Assessed as safe by the CIR.
CAS #
25068-38-6
See origin →
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Fights Acne
Helps reduce acne breakouts
Potentially supports skin clarity
Assists in controlling excess oil
Traditional Use
A synthetic resin developed in the early-to-mid 20th century for nail polish and lacquers. Created to provide adhesion, hardness, and glossy finish in nail coating formulations.
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
No
Allergen Warning
⚠️ Formaldehyde
EWG
4
CIR
Safe as used
Pregnancy
No
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: CosIng · EWG · CIR