Ceteareth-25 is a polyethylene glycol (PEG) ether of cetearyl alcohol used as a nonionic emulsifier and solubilizer to blend oil and water phases and stabilize creams and lotions. It is a formulation ingredient rather than a treatment active.
| Reported effect | How often | Notes |
|---|---|---|
| Skin irritation | Uncommon | Mild stinging or redness possible, especially on compromised or sensitive skin. |
| Allergic contact dermatitis | Rare | PEG-ether emulsifiers can occasionally act as contact sensitizers. |
| Increased skin penetration of other ingredients | Uncommon | As a surfactant it may enhance permeation, potentially heightening reactions to co-formulated actives. |
| 1,4-dioxane contamination concern | Rare | Ethoxylated ingredients may contain trace dioxane byproducts unless purified; not a direct topical reaction. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.