Emulsifier

Ceteth-10

INCI: CETETH-10

Reviewed by Rosie · Last updated 14 Aug 2026

A gentle emulsifier that helps blend oil and water-based ingredients in skincare formulations

Best For Skin Types

All

Usage Frequency

Daily

What Is Ceteth-10?

Ceteth-10 is a non-ionic surfactant derived from cetyl alcohol, a fatty alcohol commonly used in skincare and cosmetic formulations. It functions primarily as an emulsifier, helping to stabilise mixtures of oil and water that would otherwise separate. This ingredient is created through ethoxylation, a process that makes the cetyl alcohol molecule more hydrophilic (water-loving).

In skincare products, Ceteth-10 allows formulators to create stable creams, lotions and serums with consistent texture and performance. It appears in formulations across various product categories and skin types, working behind the scenes to maintain product integrity rather than delivering direct skin benefits.

How It Works

Ceteth-10 has a molecular structure with both water-loving and oil-loving ends, making it an ideal mediator between incompatible ingredients. In an emulsion, these molecules position themselves at the interface between oil and water droplets, reducing surface tension and preventing separation.

When applied to skin, its mild surfactant properties allow it to interact with sebum and dirt, aiding removal during cleansing. Unlike harsher surfactants, it maintains skin's natural lipid balance and is unlikely to cause irritation in typical formulation concentrations.

Clinical Evidence & References

Ceteth-10 has a long history of safe use in cosmetic formulations, and its stability and efficacy as an emulsifier are well-established in industry practice. However, published clinical studies specifically investigating Ceteth-10's effects on skin are limited.

The ingredient is recognised as safe by regulatory authorities including the European Commission and is widely used across skincare, indicating its tolerability in formulated products. Further targeted research would help characterise any potential benefits beyond its functional role as an emulsifier.

How to Use

Ceteth-10 is a formulation ingredient rather than an active ingredient, so there are no specific usage guidelines beyond using the product as directed. Its effectiveness depends on overall formulation design, so it works best as part of a well-balanced skincare routine tailored to your individual skin needs.

Safety & Precautions

Ceteth-10 is generally well-tolerated and considered safe for use in cosmetics across all skin types. It is non-toxic and unlikely to cause irritation at typical concentrations, though those with extreme sensitivity to surfactants may prefer to patch-test.

Frequently Asked Questions

From the Clinic

Not sure what your skin actually needs?

Two minutes, a few questions, and we’ll point you at what matters — no guesswork.

Take the skin quiz

Learn More About Skincare Ingredients

Explore our comprehensive ingredient glossary to understand what's in your products.

Browse All Ingredients

Authorised Stockist

Official UK retailer

Tracked Delivery

Free UK shipping over £50

5 Star Rating

Trusted by thousands

Expert Advice

Free consultations