Oleth-20

What is Oleth-20?

Oleth-20 is the cosmetic name for polyethylene glycol 20 oleyl ether, a non-ionic surfactant produced by ethoxylating oleyl alcohol, typically sourced from vegetable oils. This clear, oily liquid serves as a multifunctional ingredient in rinse-off and leave-on products like shampoos, body washes, lotions, and toners. It functions by reducing surface tension at interfaces, enabling oil and water to blend into stable emulsions. In cleansing products, it generates micelles that encapsulate dirt, sebum, and residues for effortless removal. As an emulsifier, it creates uniform textures in creams and conditioners. Its solubilizing action disperses lipophilic components, such as fragrances or essential oils, into aqueous bases, yielding transparent solutions without cloudiness. This versatility supports diverse formulations while maintaining mild performance across product types.

Comedogenic Rating 1/5 Low risk of clogging pores
EWG Safety Rating 1-3 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Fragrance ingredient
Contributes scent character and/or masks base odors, shaping the overall sensory experience of the formula (subject to allergen and IFRA considerations).
Surfactant
Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.
Cleansing agent
Removes dirt, oil, and impurities by lowering surface tension and forming micelles, enabling soils to be lifted and rinsed away from skin, hair, or teeth.
Emulsifying agent
Enables stable mixing of oil and water phases by forming an interfacial film, helping create lotions, creams, and cleansers with consistent texture.
Solubilizing agent
Helps incorporate oils and fragrance into water-based formulas by forming micro-solutions, enabling clear sprays, toners, and micellar products.

Benefits

Gentle surface tension reduction aids in effective dirt and oil removal during cleansing.

Stabilizes oil-in-water emulsions for smooth, consistent product textures.

Facilitates incorporation of fragrances and oils into clear 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 cleansers or shampoos for reliable performance.
People with known sensitivities to polyethylene glycol derivatives.
Users of lotions and creams seeking stable, non-separating textures.
Individuals preferring strictly natural or PEG-free formulations.
Those preferring formulas with solubilized scents in toners or sprays.
Those experiencing irritation from non-ionic surfactants in patch tests.

Safety Notes

  • Rated low hazard overall by cosmetic safety assessments.
  • Potential for low-level impurities managed through manufacturing standards.

Frequently Asked Questions about Oleth-20

What is Oleth-20 used for in skincare?

It acts as a surfactant for cleansing, emulsifying agent for blending phases, and solubilizer for fragrances in products like cleansers and lotions.

Is Oleth-20 safe for sensitive skin?

It carries a low irritation profile from safety evaluations, suitable for most but patch test if sensitive.

Does Oleth-20 clog pores?

It has a low comedogenic rating, making it unlikely to contribute to pore blockage in formulations.