Adipic Acid/1,4-Butanediol/Terephthalate Copolymer
AKA “Polyester polymer, Film former
Synthetic
Ingredient Facts
Adipic acid/1,4-butanediol/terephthalate copolymer
AKA: Polyester polymer, Film former
Synthetic · Buffer · EWG: 4
Synthetic
Fragrance
Synthetic
Clean
A stabilizing ingredient that helps maintain product texture and fragrance stability, keeping your formula fresh and effective.
Form
Powder
State
Solid
See origin →
Functions
Buffer
Fragrance
Added for scent. Can be natural or synthetic. Common irritant and allergen — one of the top reasons people react to products.
Stabilizes pH
Masks Odor
Antioxidant Protection
Fights Bacteria
Provides antioxidant protection
Helps fight skin
Damaging bacteria
Creates smooth skin texture
Traditional Use
A synthetic polymer created in the late 20th century through chemical engineering. Designed to function as a film-former and binder in modern cosmetic formulations.
Skin Types
all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Insufficient
Pregnancy
Yes
CIR Safety Findings
Not an Irritant
medical-approval
all-shades-safe
Regulatory Status
USAunder review
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR