Polyethylene Terephthalate
AKA “PET, Polyethylene terephthalate resin”
Ingredient
Ingredient Facts
Polyethylene terephthalate
AKA: PET, Polyethylene terephthalate resin
Ingredient · Film Forming · EWG: 1
Synthetic
Occlusive
Clean
Poly(oxy-1,2-ethanediyloxycarbonyl-1,4-phenylenecarbonyl)
CAS #
25038-59-9
Form
Powder
See origin →
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Creates Protective Barrier
Locks In Moisture
Fights Bacteria
Traditional Use
A polyester plastic polymer developed commercially in the mid-20th century. Historically used as microbeads in exfoliating products before being phased out due to environmental concerns.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Verified Jun 2026
Data: CosIng · EWG · CIR