Methoxy PEG-100

Methoxy PEG-100 molecular structure
molecular structure · PubChem
AKA: Methoxypoly(Ethylene Glycol) 100, Polyethylene Glycol Methyl Ether 100
Synthetic
Humectant
Solvent
Clean
OriginDerived from polyethylene glycol (PEG), a synthetic polymer produced from petroleum-based ethylene oxide. Synthesized through ethoxylation of methoxy-terminated polyethylene glycol chains, then capped at the 100-unit polymer length.
Poly(oxy-1,2-ethanediyl), .alpha.-hydro-.omega.-methoxy- (100 mol EO average molar ratio)
CAS #
9004-74-4
Form
Liquid
Skin Types
●all-skin-types
Best For
Dryness
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-reviewednone on file
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
2
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2012
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR