Ceteth-3

What is Ceteth-3?

Ceteth-3 is a synthetic non-ionic surfactant produced by reacting cetyl alcohol, a fatty alcohol from natural or petroleum sources, with three units of ethylene oxide. This results in a molecule featuring a long hydrophobic cetyl chain attached to a short hydrophilic polyoxyethylene segment, allowing effective bridging between oil and water phases. Primarily used in rinse-off and leave-on cosmetics like shampoos, shower gels, moisturizers, and makeup removers, it performs by reducing interfacial tension to disperse oils, stabilize emulsions against separation, and enhance the dispersion of insoluble ingredients such as fragrances. Its relatively short ethoxylation chain contributes to high water solubility, quick rinsing, and milder sensory profile compared to harsher ionic surfactants.

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.
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 thorough cleansing by breaking down oils and dirt for easy rinse-off.

Stabilizes cream and lotion formulas to prevent phase separation and ensure even application.

Promotes light foaming action in washes without drying the skin.

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 cleansers seeking gentle, effective dirt removal.
Those with rare allergies to fatty alcohols or ethoxylated compounds.
Individuals with acne-prone skin due to its non-comedogenic nature.
Individuals preferring formulations without polyethylene glycol derivatives.
People formulating or using emulsified products like lotions for smooth textures.
People sensitive to surfactants in high concentrations, despite its mild profile.

Safety Notes

  • Deemed safe for use in cosmetics at typical concentrations by expert reviews.
  • Presents low comedogenic risk, unlikely to contribute to pore blockage.

Frequently Asked Questions about Ceteth-3

What does Ceteth-3 do in skincare?

It acts as a surfactant to cleanse and an emulsifier to blend oil and water for stable products.

Is Ceteth-3 comedogenic?

No, it has a comedogenic rating of 0, making it suitable for pore-friendly routines.

How safe is Ceteth-3 for daily use?

It receives low hazard ratings and is considered safe in cosmetic applications.