Potassium Lauryl Sulfate

Benefits

Cleansing

What is Potassium Lauryl Sulfate?

Potassium lauryl sulfate is an anionic surfactant, chemically the potassium salt of sulfuric acid monoester with lauryl alcohol (dodecanol). Lauryl alcohol originates from natural sources like coconut or palm kernel oil through reduction of coconut fatty acids. In cosmetics, it appears mainly in rinse-off products such as shampoos, body washes, facial cleansers, and bubble baths. It works by reducing the surface tension of water, allowing it to mix with oils and dirt. This enables micelle formation, where hydrophobic tails capture soils and hydrophilic heads interact with water for easy rinsing. Additionally, it generates stable foam for better product spreadability and sensory appeal, while aiding emulsion stability by positioning at oil-water interfaces to prevent phase separation.

Comedogenic Rating 0/5 Low risk of clogging pores

EWG Safety Rating 1 View on EWG →

PubChem View on PubChem →

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.

Benefits

Delivers effective cleansing by lifting dirt, oil, and impurities from skin and hair.

Produces abundant foam for an enjoyable washing experience and even application.

Supports formulation of stable cleansers and emulsions with smooth 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
Individuals seeking thorough yet gentle cleansing in daily routines.	Those with highly reactive skin prone to surfactant sensitivity.
Users of shampoos and body washes preferring foaming products.	People experiencing dryness from frequent washing.
People with non-comedogenic needs, as it rates zero on pore-clogging potential.	Individuals preferring completely non-foaming, minimalist cleansers.

Safety Notes

Considered low hazard in cosmetic concentrations per safety assessments.
Typically used in rinse-off products to minimize residue on skin.

Frequently Asked Questions about Potassium Lauryl Sulfate

What is potassium lauryl sulfate derived from?

It comes from lauryl alcohol sourced from coconut or palm kernel oils, then sulfated and neutralized with potassium.

Is it suitable for sensitive skin?

It has a low irritation profile, making it gentler for many, though patch testing is wise for reactives.

How does it differ from sodium lauryl sulfate?

The potassium salt form tends to be milder with potentially less drying effect in formulations.