PEG-350
AKA “Polyethylene glycol 350, PEG 350”
Ingredient
Ingredient Facts
PEG-350
AKA: Polyethylene glycol 350, PEG 350
Ingredient · Binding · EWG: 4
Synthetic
Solvent
Not Clean
Poly(oxy-1,2-ethanediyl), .alpha.-hydro-.omega.-hydroxy-, (350 mol EO average molar ratio)
CAS #
25322-68-3
Form
Liquid
See origin →
Functions
Binding
Solvent
Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.
Holds Formula Together
Dissolves Ingredients
Holds ingredients together
Dissolves other ingredients
Traditional Use
High-molecular-weight polyethylene glycol polymer developed in the mid-20th century. Used as a humectant and solvent in cosmetics to improve hydration and create stable formulations.
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