Sodium Oleth Sulfate

What is Sodium Oleth Sulfate?

Sodium Oleth Sulfate is a synthetic anionic surfactant produced by ethoxylating oleyl alcohol—derived from plant-based oleic acid—with ethylene oxide chains, followed by sulfation and neutralization with sodium hydroxide. This creates a water-soluble molecule with a sulfate head and hydrophobic tail, ideal for rinse-off personal care items like shampoos, body washes, facial cleansers, and bubble baths. It functions by disrupting the lipid barrier on skin or hair, enabling micelles to encapsulate and rinse away oils, dirt, and residues. The ethoxylation enhances mildness, water dispersibility, and foam stability compared to harsher sulfates, while supporting emulsion integrity in multi-phase formulas for even distribution and sensory appeal during use.

Comedogenic Rating 0/5 Low risk of clogging pores

EWG Safety Rating 1-3 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

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.

Foaming

Generates foam during use to help distribute the product and lift soils; typically delivered by surfactants that create stable bubbles under agitation.

Benefits

Delivers effective dirt and oil removal through micelle formation.

Produces stable, rich foam to enhance product spreadability.

Stabilizes emulsions for consistent lotion and cleanser textures.

Who It's For

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

Who May Benefit	Who Should Avoid
People with normal or oily skin needing thorough cleansing.	Those with highly sensitive or reactive skin.
Individuals seeking foamy shampoos or body washes.	People experiencing dryness from surfactant use.
Acne-prone users, as it ranks non-comedogenic.	Individuals preferring sulfate-free formulations.

Safety Notes

Rated low to moderate concern by hazard databases for typical cosmetic use.
Suitable mainly for rinse-off products to minimize exposure.

Frequently Asked Questions about Sodium Oleth Sulfate

What does Sodium Oleth Sulfate do in products?

It acts as a surfactant to cleanse by lowering surface tension, create foam, and emulsify oils with water.

Is Sodium Oleth Sulfate irritating?

It has lower irritation potential than non-ethoxylated sulfates but may affect sensitive skin.

Safe for daily use in shampoos?

Generally safe in rinse-off products per cosmetic safety assessments.