PPG-33
AKA “Polypropylene Glycol-33, PPG”
Skin Conditioning
Ingredient Facts
PPG-33
AKA: Polypropylene Glycol-33
Skin Conditioning · Skin Conditioning · EWG: 4
Synthetic
Skin Conditioner
Not Clean
Poly[oxy(methyl-1,2-ethanediyl)], .alpha.-hydro-.omega.-hydroxy- (33 mol PO average molar ratio)
CAS #
25322-69-4
Form
Liquid
See origin →
Functions
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Locks in moisture
Traditional Use
Polypropylene glycol polymer synthesized for use as a humectant and solvent in cosmetics. Developed alongside other glycol derivatives to improve product performance.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
PPG-33
European Commission
EU Cosmetic Ingredient Database (CosIng)
PPG-33 Butyl Ether
European Commission
EU Cosmetic Ingredient Database (CosIng)
PPG-33-Buteth-45
European Commission
EU Cosmetic Ingredient Database (CosIng)
PPG-33-Buteth-45
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Verified Jun 2026
Data: CosIng · EWG · CIR