Oleth-5

Benefits
Cleansing

What is Oleth-5?

Oleth-5 is a polyoxyethylene ether derived from oleyl alcohol, a fatty alcohol obtained from vegetable oils such as olive or palm, ethoxylated with five units of ethylene oxide. This creates a hydrophilic-lipophilic balance ideal for nonionic surfactants. In cosmetic formulations, it appears in cleansing products like shampoos, body washes, and facial cleansers, as well as in lotions and creams. It works by reducing surface tension at the oil-water interface, allowing water to spread and lift away soils, sebum, and residues effectively. As an emulsifying agent, it forms a stable film around dispersed oil droplets, preventing coalescence and maintaining product uniformity. Its solubilizing properties help integrate hydrophobic fragrance compounds into aqueous bases, enhancing scent stability without altering the formula's clarity or feel. This multifunctional role supports clear, effective personal care items.

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

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.
Emulsifying agent
Enables stable mixing of oil and water phases by forming an interfacial film, helping create lotions, creams, and cleansers with consistent texture.

Benefits

Supports thorough cleansing by loosening dirt and excess oils.

Stabilizes oil-in-water emulsions for smooth lotion textures.

Facilitates fragrance incorporation for pleasant sensory profiles.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Users of daily shampoos and body washes needing reliable lather.
Those with oily skin due to moderate comedogenic potential.
Individuals preferring stable cream and lotion formulas.
Acne-prone skin types sensitive to pore-clogging ingredients.
People seeking mild surfactants in rinse-off cleansers.
Individuals preferring minimalist, non-surfactant based products.

Safety Notes

  • EWG rates it 1-3, indicating low to moderate overall concern.
  • Deemed safe in cosmetics by expert safety assessments.

Frequently Asked Questions about Oleth-5

What does Oleth-5 do in products?

It cleanses by reducing surface tension, emulsifies oils in water, and helps blend fragrances.

Is Oleth-5 safe for daily use?

Safety reviews rate it low concern for cosmetic concentrations.

Why avoid Oleth-5 on oily skin?

Moderate comedogenic rating may contribute to pore congestion.