Polypropylene Glycol
Reviewed by Rosie · Last updated 18 Aug 2026
Also known as: PPG
Polymer of propylene glycol | Functions as a humectant and delivery agent
Addresses
EWG Safety Score
What Is Polypropylene Glycol?
Also known by the acronym PPG, polypropylene glycol is a polymer, or large molecule, of propylene glycol. Like propylene glycol, it is used as a humectant and a delivery agent in cosmetics. Despite reports that it can be a skin sensitizer, researchers have found that it does not present a health risk for people when used in cosmetics.
Clinical Evidence & References
Published Research
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Critical Reviews in Toxicology, April 2013, issue 4, pages 363-390 [https://pubmed.ncbi.nlm.nih.gov/23656560/]
Frequently Asked Questions
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Polyethylene Glycol
Helps keep products stable | Functions similar to glycerin
PPG-12/SMDI Copolymer
A synthetic polymer combined with polypropylene glycol | Offers film-forming and skin-conditioning properties
PPG-14 Butyl Ether
Functions as a solvent and skin-conditioning agent | Helps restore a supple feel to skin and enhances the texture of personal care product formulas
PPG-20 Methyl Glucose Ether
Blend of polypropylene glycol + methyl glucose derivatives | Helps soften and smooth skin and hair
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