PEG-9
molecular structure · PubChem
AKA: NONAETHYLENE GLYCOL, 3, 6, 12, 15, 18, 21, 24-Octaoxahexacosane-1, 26-diol, 2-[2-[2-[2-[2-[2-[2-[2-(2-hydroxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethanol, CHEBI:39784, AI3-01837, 4-01-00-02409 (Beilstein Handbook Reference), 2-(2-(2-(2-(2-(2-(2-(2-(2-hydroxyethoxy)ethoxy)ethoxy)ethoxy)ethoxy)ethoxy)ethoxy)ethoxy)ethanol
Synthetic
Humectant
Solvent
Clean
OriginPEG-9 belongs to the polyethylene glycol (PEG) chemical family, synthesized from ethylene oxide. It is produced through the polymerization of ethylene oxide with water, creating a polymer chain of approximately nine ethylene glycol units.
Poly(oxy-1,2-ethanediyl), .alpha.-hydro-.omega.-hydroxy-, (9 mol EO average molar ratio)
Formula
C18H38O10
Mol. Weight
414.50
CAS #
25322-68-3
Form
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
2
CIR
Safe as used
Pregnancy
Yes
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR
murphy