Ingredient deep-dive

PEG (Polyethylene Glycol): Is It a Microplastic?

Medium concernPEG / glycol

Synthetic polymer / surfactant family. Made with ethylene oxide, so it can carry trace 1,4-dioxane, a manufacturing by-product; FDA's 2008 survey found none in 80% of the products tested.

Where it appears

Moisturizers
Sunscreens (as emulsifier)
Shampoos and conditioners
Toothpaste (as thickener)

Regulatory status (2026)

European Union

Permitted but ethylene oxide impurities and 1,4-dioxane contamination flagged in ongoing safety review.

United States

FDA permits cosmetic use; California Prop 65 requires 1,4-dioxane labeling above threshold.

Cleaner alternatives

Glycerin
Sorbitol
Plant-derived emulsifying wax NF

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PEG (Polyethylene Glycol), common questions

Is PEG (Polyethylene Glycol) a microplastic?

Yes: it is classified as a synthetic polymer. Synthetic polymer / surfactant family. Made with ethylene oxide, so it can carry trace 1,4-dioxane, a manufacturing by-product; FDA's 2008 survey found none in 80% of the products tested.

Is PEG (Polyethylene Glycol) banned?

EU: Permitted but ethylene oxide impurities and 1,4-dioxane contamination flagged in ongoing safety review. US: FDA permits cosmetic use; California Prop 65 requires 1,4-dioxane labeling above threshold.

What can I use instead of PEG (Polyethylene Glycol)?

Cleaner alternatives include: Glycerin; Sorbitol; Plant-derived emulsifying wax NF.

What products contain PEG (Polyethylene Glycol)?

Commonly found in: Moisturizers; Sunscreens (as emulsifier); Shampoos and conditioners; Toothpaste (as thickener).