Worth a closer look
Chemical of concern
- What it can be used for
- Cleans, makes foam and mixes oil and water (the functions the EU ingredient database, CosIng, lists for it; a product may use it for any of them)
- CAS number
- 3088-31-1, 9004-82-4, 68891-38-3, 1335-72-4, 68585-34-2, 91648-56-5
Why it’s flagged
Listed as a chemical of concern by the Campaign for Safe Cosmetics.
- “1,4-Dioxane”: the concern is 1,4-dioxane, a contaminant that can form when ethoxylated ingredients like this are made. It isn’t the ingredient itself and won’t be on the label. Source: Campaign for Safe Cosmetics
The Campaign for Safe Cosmetics is an advocacy group. Its profiles explain why it considers these ingredients a concern.
What this page can’t tell you
These lists describe what a substance can do, its hazard. The risk from one product depends on how much is in it and how you use it, and the label doesn’t say how much.
Not being on a list doesn’t make an ingredient safe. It may never have been assessed.
Check your products
Check a whole labelProducts that list itEWG Skin DeepShop fragrance-free
“Products that list it” opens Open Beauty Facts, a free database anyone can edit.
Flagged the same way
Official lists checked September 2026. Spotted a mistake? Tell us.