PEG-350
AKA “Polyethylene glycol 350, PEG 350”
Synthetic
Ingredient Facts
PEG-350
AKA: Polyethylene glycol 350, PEG 350
Synthetic · Humectant · EWG: 4
Synthetic
Humectant
Solvent
Skin Conditioner
Synthetic
Not Clean
A lightweight humectant that helps bind moisture to skin and keeps formulas smooth and easy to apply.
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.
Humectant
A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.
Moisturising
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
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Verified Feb 2026
Data: CosIng · EWG · CIR