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CETETH-5.

Valuable CAS 9004-95-9 / 4478-97-1 / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

Ceteth-5 is a non-ionic ethoxylated alcohol that functions as a high-performance emulsifier and mild surfactant. It acts as a structural bridge in skincare formulations, allowing oily and aqueous components to merge into a stable, sophisticated texture with a balanced hydrophilic-lipophilic profile.

Emulsifying Surfactant Cleansing Solubilizing

Science

By lowering the interfacial tension between oil and water, Ceteth-5 facilitates the formation of stable micelles. With a Hydrophilic-Lipophilic Balance (HLB) of approximately 10–12, it is specifically optimized for creating fluid oil-in-water (O/W) emulsions and solubilizing lipophilic debris during the cleansing process without disrupting the skin's lipid barrier.


Research

High confidence
Effective range 2.5–5%
Optimal

3%

Key findings

  1. 01 Clinical evaluations of Ceteth analogues demonstrate that concentrations up to 3.0% are non-irritating to healthy, intact skin barriers.
  2. 02 Safety data indicates that irritation potential is dose-dependent, with significant reactivity observed only when concentrations exceed the 5.0% threshold.

Transparency

Not commonly dusted
Min. effective
1%
Red flag below
0.5%

As a functional emulsifier rather than a bioactive 'hero' ingredient, Ceteth-5 is rarely used for marketing claims; however, it must be present in sufficient quantities (typically >1%) to ensure emulsion stability and texture integrity.


The Formula

Solubility
Both
Optimal pH 5 – 7.5
0 7 14

Stability

Exhibits exceptional chemical resilience; remains stable in the presence of reactive agents like hydrogen peroxide. Its non-ionic nature ensures compatibility across a wide range of active ingredients.

Synergies

  • Hydrophobic actives
  • O/W emulsion systems
  • Micellar cleansers

Conflicts

  • Strong oxidizers
  • Strong mineral acids

Safety

CIR Status
Safe as used
Max tested
10%
Pregnancy
Safe
Sensitization risk Low

Manufacturers must utilize vacuum stripping during production to ensure potential trace impurities like 1,4-dioxane remain below the safety threshold of 1 ppm.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

A reliable and versatile stabilizer that ensures formula homogeneity and skin-feel without compromising the integrity of the epidermal barrier.


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