PEG-135
AKA “Polyethylene Glycol 135”
Humectant
Ingredient Facts
PEG-135
AKA: Polyethylene Glycol 135
Humectant · Humectant · EWG: 4
Synthetic
Humectant
Solvent
Not Clean
Poly(oxy-1,2-ethanediyl), .alpha.-hydro-.omega.-hydroxy-, (135 mol EO average molar ratio)
CAS #
25322-68-3
Form
Liquid
See origin →
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
Traditional Use
A high-molecular-weight polyethylene glycol developed in the mid-20th century for pharmaceutical and cosmetic use. Used as a humectant and thickening agent in modern skincare products.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR