PEG ●
TL;DR. This ingredient is primarily a solvent and humectant, helping dissolve water-compatible actives, improve slip, and reduce formula dry-down. In higher molecular weights, it can also thicken, bind, or act as a soft film-forming base.
What does PEG do in a cosmetic formula?
This ingredient is primarily a solvent and humectant, helping dissolve water-compatible actives, improve slip, and reduce formula dry-down. In higher molecular weights, it can also thicken, bind, or act as a soft film-forming base.
Is PEG clean?
Clean-beauty standards often flag it because it is made by ethoxylation and can carry trace 1,4-dioxane unless tightly purified. It is generally low-irritation on skin, but its manufacturing chemistry puts it on many restricted lists.
Is PEG sustainable?
It is usually derived from petroleum-based feedstocks, although bio-based routes exist. Lower molecular weights are more biodegradable than larger polymers, but overall it is not a strong renewable or circular-material choice.
Is PEG COSMOS-approved?
It is not permitted in COSMOS-organic or COSMOS-natural products because synthetic ethoxylated materials are outside the standard. From a Green Chemistry lens, the main drawbacks are nonrenewable feedstocks, reactive gas processing, and impurity-control needs, even though it is water-soluble and typically used at low levels.
How does PEG work chemically?
The molecule is a neutral, water-soluble chain of repeating oxyethylene units, with properties that shift from liquid to waxy solid as molecular weight rises. Typical use ranges from about 1 to 10% depending on grade and function, and it is broadly stable across normal cosmetic pH but can increase penetration of some dissolved ingredients.
Last updated 2026-05-15