Ceteth-15

What is Ceteth-15?

Ceteth-15 is a synthetic polyether compound formed by ethoxylating cetyl alcohol—a long-chain fatty alcohol sourced from plant oils—with 15 molecules of ethylene oxide. This creates a balanced amphiphilic molecule with both water-attracting and oil-compatible parts. Primarily used in rinse-off and leave-on cosmetics like shampoos, shower gels, moisturizers, and foundations, it acts as a non-ionic surfactant to lower interfacial tension, allowing dirt, oils, and residues to be rinsed away effectively during cleansing. As an emulsifier, it stabilizes oil-in-water mixtures by forming a protective film around droplets, preventing phase separation and ensuring even distribution of active ingredients for consistent product texture and spreadability. Its versatile, gentle profile supports formulation of lightweight, non-greasy textures without harsh effects.

Comedogenic Rating 0/5 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:

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

Facilitates stable blending of oils and water for even-textured creams and lotions.

Aids gentle cleansing by lifting surface impurities in washes and shampoos.

Contributes to non-comedogenic formulas that maintain clear pores.

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 seeking mild surfactant action.
Those with rare sensitivity to ethoxylated ingredients.
People with normal or oily skin preferring stable emulsion products.
People preferring completely PEG-free formulations.
Users of lotions and body washes for smooth application.
Individuals experiencing irritation from similar surfactants.

Safety Notes

  • Rated low concern overall by EWG with scores from 1 to 3.
  • Considered safe for cosmetic use in reviews of similar PEG ethers by expert panels.

Frequently Asked Questions about Ceteth-15

What is the main function of Ceteth-15?

It serves as a surfactant and emulsifier to mix oils and water stably in products like lotions and cleansers.

Is Ceteth-15 suitable for acne-prone skin?

Yes, with a comedogenic rating of 0, it poses low risk of clogging pores.

Does Ceteth-15 cause irritation?

It has low irritation potential as a mild non-ionic surfactant.