Trideceth-9 is a polyethylene glycol ether of tridecyl alcohol used as a nonionic surfactant, emulsifier, and solubilizer in cosmetic and skincare formulations. It helps blend oil and water phases and disperse fragrances and other oil-soluble ingredients.
| Reported effect | How often | Notes |
|---|---|---|
| Mild skin irritation | Uncommon | Possible with higher concentrations or on compromised skin barrier. |
| Eye irritation | Uncommon | Can occur with direct ocular contact, relevant in cleansers and rinse-off products. |
| Allergic contact dermatitis | Rare | Sensitization to ethoxylated surfactants is infrequently reported. |
| Concern over ethylene oxide/1,4-dioxane trace contaminants | Rare | Byproducts of ethoxylation; minimized by manufacturer purification and within regulatory limits. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.