C12-13 Pareth-3 is an ethoxylated fatty alcohol (a polyethylene glycol ether derived from C12-13 alcohols) used in cosmetic formulations as a nonionic surfactant, emulsifier, and solubilizer. It helps blend oil and water phases and disperse poorly soluble ingredients.
| Reported effect | How often | Notes |
|---|---|---|
Skin irritation | Uncommon | Mild irritation possible, generally concentration-dependent. |
Allergic contact dermatitis/sensitization | Rare | Sensitization to ethoxylated surfactants is infrequently reported. |
Eye irritation | Uncommon | Can cause stinging or irritation on direct eye contact. |
1,4-dioxane contamination concern | Rare | Ethoxylated ingredients may contain trace 1,4-dioxane byproduct unless purified; a manufacturing impurity rather than direct ingredient effect. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.