PEG-4 Methyl Ether

AKA: 23783-42-8, 2, 5, 8, 11-Tetraoxatridecan-13-ol, Tetraethylene glycol monomethyl ether, Tetraethyleneglycol monomethyl ether, M-PEG4-alcohol, MPEG4-OH, 3, 6, 9, 12-Tetraoxatridecan-1-ol
Synthetic
Humectant
Solvent
Not Clean
OriginSynthesized from ethylene oxide and methanol, belonging to the polyethylene glycol (PEG) chemical family. Produced through controlled polymerization of ethylene oxide with methanol as the starting alcohol.
Poly(oxy-1,2-ethanediyl), .alpha.-methyl-.omega.-hydroxy- (4 mol EO average molar ratio)
Solubility Solubility in water: miscible
Formula
C9H20O5
Mol. Weight
208.25
CAS #
9004-74-4
Form
Liquid
State
Liquid
Skin Types
●all-skin-types
Best For
General
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-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
CIR lists it as not reported to be in use.
CIR · report published 2012
Regulatory Status
USA✔ permitted
CANADA✔ permitted
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR