Oleth-50
What is Oleth-50?
Oleth-50, chemically polyoxyethylene (50) oleyl ether, is a synthetic nonionic surfactant made by reacting oleyl alcohol—derived from unsaturated fatty acids in plant oils—with ethylene oxide to add 50 hydrophilic ethoxy units. This structure gives it amphiphilic properties, with a lipophilic tail from the oleyl chain and a hydrophilic head from the polyoxyethylene chain. In cosmetic formulations, it appears in shampoos, body washes, facial cleansers, and lotions. It functions by lowering surface tension between oil and water phases to form stable emulsions, creating micelles that encapsulate dirt and oils for rinse-off cleansing, and solubilizing water-insoluble fragrance compounds into aqueous systems without clouding or separating.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Supports effective removal of dirt, oil, and impurities during cleansing routines.
Facilitates blending of oil and water ingredients for smoother product textures.
Enables clear incorporation of scents into water-based formulas.
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| Individuals using daily shampoos or body washes for routine cleansing. | People with known allergies to polyethylene glycol derivatives. |
| Users of emulsified lotions or creams seeking stable textures. | Individuals preferring completely natural or PEG-free formulations. |
| Those preferring products with well-dispersed fragrances. | Those sensitive to ethoxylated surfactants in high concentrations. |
Safety Notes
- Cosmetic Ingredient Review assessments support its use in typical cosmetic concentrations.
- Nonionic nature contributes to generally low irritation potential in rinse-off products.
Frequently Asked Questions about Oleth-50
What is Oleth-50 used for in cosmetics?
It serves as a surfactant for cleansing, emulsifying oils in water, and solubilizing fragrances.
Is Oleth-50 comedogenic?
It has a comedogenic rating of 0, indicating low likelihood of pore clogging.
How safe is Oleth-50 in skincare?
EWG rates it 1-3; cosmetic reviews deem it safe at used levels with low irritation risk.