PEG-100

PEG-100 molecular structure
molecular structure · PubChem
AKA: Polyethylene Glycol 100, Polyethylene Glycol 100000, PEG 100000
Synthetic
Humectant
Solvent
Not Clean
OriginProduced from ethylene oxide, a petrochemical derived from crude oil or natural gas. Synthesized through polymerization of ethylene oxide molecules, followed by catalytic hydrogenation to achieve the desired molecular weight.
Poly(oxy-1,2-ethanediyl), .alpha.-hydro-.omega.-hydroxy-, (100 mol EO average molar ratio)
CAS #
25322-68-3
Form
Liquid
Skin Types
●all-skin-types
Best For
Dehydration
Pregnancy & Breastfeeding Safe
Yes
Functions
Humectant
A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.
Solvent
Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.
Locks In Moisture
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed0 reviews
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
4
CIR
Safe as used
Pregnancy
Yes
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR