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Moumoujus

CETETH-2.

Valuable CAS 9004-95-9 / SURFACTANT - EMULSIFYING

Ceteth-2 is a versatile non-ionic surfactant and lipophilic emulsifier used to bridge oil and water phases in skincare formulations. It is particularly valued for its ability to create stable, waxy textures in rich creams and sunscreens while maintaining efficacy across a broad pH spectrum.

Summary

emulsifying surfactant stabilizing

Science

Mechanism of Action

As a lipophilic agent with a low Hydrophilic-Lipophilic Balance (HLB) of approximately 5.3, Ceteth-2 reduces interfacial tension to stabilize water-in-oil emulsions. It works by forming a robust interfacial film around oil droplets, preventing coalescence and ensuring a uniform distribution of ingredients.

Research

Clinical Evidence

High confidence
Effective range 1–10%
Optimal

3%

Key findings

  1. 01 Clinical patch testing at a 3.0% concentration confirmed the ingredient is non-irritating to intact human skin.
  2. 02 Research indicates dose-dependent irritation at concentrations exceeding 5.0%, particularly in undiluted forms.
  3. 03 Studies on abraded skin at 2.5% showed potential for irritation, emphasizing the importance of formula-specific irritation testing.

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
0.5%
Red flag below
10%

Ceteth-2 is a functional texture-builder rather than an 'active' ingredient marketed for results; therefore, it is rarely 'dusted' for marketing claims. Its presence is typically dictated by the structural requirements of the emulsion.

The Formula

Formulation

Solubility
Both
Optimal pH 2 – 12
0 7 14

Stability

Highly resilient waxy solid that remains stable in both extreme acidic and alkaline environments. It has a melting point between 27-35°C.

Synergies

  • Co-emulsifiers
  • Oil-soluble UV filters

Conflicts

  • Strong oxidizing agents
  • Specific anionic surfactants that may form complexes

Safety

Safety Profile

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

Safe for intact skin up to 10.0%. It should be avoided on severely damaged or burned skin due to potential risks associated with PEG-related nephrotoxicity in compromised barriers.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
No Oily
No Sensitive
Irritancy Low
Comedogenicity Moderate

Our Assessment

Verdict

Valuable

A reliable and pH-stable functional emulsifier best suited for dry and normal skin types in rich, barrier-focused formulations.

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