Polyethylene Isoterephthalate

AKA: PEIT, PET Polymer
Synthetic
Not Clean
OriginDerived from ethylene glycol and terephthalic acid or dimethyl terephthalate, both petroleum-based chemicals. Synthesized through polycondensation esterification of these monomers under heat and catalyst conditions.
Poly(oxyethyleneoxy-1,4-phthaloyl, oxyethyleneoxy-1,3-phthaloyl)
CAS #
-
Form
Powder
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Bulking
Moisturizing
Strengthens Barrier
Adds volume
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
4
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
Leave-on0.04–0.5%
Rinse-offNot reported
0%50%100%
CIR reported use · report published 2014
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR