Potassium Laureth Phosphate

What is Potassium Laureth Phosphate?

Potassium Laureth Phosphate is a synthetic anionic surfactant produced by ethoxylating lauryl alcohol (typically 3-7 moles of ethylene oxide), esterifying with phosphoric acid to form a monoester, and neutralizing with potassium hydroxide. It belongs to the alkyl ether phosphate family and is primarily used in rinse-off cosmetics such as shampoos, conditioners, body washes, facial cleansers, and bath products. In formulations, it lowers surface tension to detach dirt, sebum, and residues from skin and hair, facilitating their rinse-away. Its structure also enables emulsification of oil-water mixtures for stable textures and enhances foam density and stability, improving product sensory appeal. Compared to traditional sulfates, its phosphate group imparts milder behavior, supporting gentler cleansing action in everyday personal care items.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 2 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.
Foam booster
Enhances foam volume and creaminess and can stabilize lather, improving sensory feel and perceived cleansing in shampoos and wash-off products.
Solubilizing agent
Helps incorporate oils and fragrance into water-based formulas by forming micro-solutions, enabling clear sprays, toners, and micellar products.

Benefits

Delivers effective yet gentle dirt and oil removal from skin and hair.

Boosts rich, stable foam for enhanced cleansing experience.

Stabilizes emulsions and solubilizes hard-to-mix ingredients like fragrances.

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 shampoos and body washes seeking creamy lather.
Those with rare sensitivities to ethoxylated compounds.
Individuals with normal to oily skin needing reliable cleansing.
Individuals preferring completely phosphate-free formulations.
People preferring milder alternatives to sulfate-based surfactants.
People experiencing irritation from phosphate surfactants.

Safety Notes

  • Low hazard rating from independent cosmetic safety databases.
  • Deemed safe for typical cosmetic concentrations in rinse-off products.

Frequently Asked Questions about Potassium Laureth Phosphate

What does Potassium Laureth Phosphate do in products?

It cleanses by reducing surface tension, boosts foam, and emulsifies for stable formulas.

Is it suitable for sensitive skin?

Generally mild with low irritation potential per safety assessments.

What products contain it?

Common in shampoos, body washes, conditioners, and facial cleansers.