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Moumoujus

CETETH-4 STEARATE.

Valuable / SKIN CONDITIONING

A sophisticated non-ionic emulsifier and emollient that bridges the gap between oil and water phases in skincare formulations. It creates elegant, stable textures while simultaneously reinforcing the skin's moisture barrier by forming a breathable, protective film.

Summary

Emulsifying Surfactant Skin conditioning Texture enhancer

Science

Mechanism of Action

By leveraging its dual-affinity molecular structure—comprising a hydrophilic polyethylene glycol chain and a lipophilic stearate group—it reduces interfacial tension to create smooth emulsions. On the skin, it acts as an occlusive emollient, trapping moisture within the stratum corneum to prevent trans-epidermal water loss (TEWL).

Research

Clinical Evidence

High confidence
Effective range 0.5–3%
Optimal

3%

Key findings

  1. 01 Clinical patch testing confirms that concentrations up to 3% are non-irritating to intact human skin.
  2. 02 Related alkyl PEG ethers demonstrate a dose-dependent irritation profile, remaining safe and inert within the recommended 3% threshold.

Transparency

Dusting Analysis

Not commonly dusted
Min. effective
0.5%
Red flag below
0.1%

As a functional texture enhancer and emulsifier, this ingredient is rarely 'dusted' for marketing purposes; it is typically used at functional levels (0.5-3.0%) to ensure formula stability.

The Formula

Formulation

Solubility
Oil
Optimal pH 4.5 – 7.5
0 7 14

Stability

Maintains excellent stability under standard conditions but is susceptible to hydrolysis in extreme acidic or alkaline environments due to its ester linkage.

Synergies

  • Glycerin
  • Fatty Alcohols
  • Non-polar emollient oils

Conflicts

  • Strong oxidizing agents
  • Highly acidic actives (pH < 4.0)
  • Strong bases

Safety

Safety Profile

CIR Status
Safe as used
Max tested
3%
Pregnancy
Safe
Sensitization risk Low

Quality control is paramount; Moumoujus standards require 1,4-dioxane levels to remain below 1 ppm to ensure maximum purity and safety.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

A reliable, low-irritancy emulsifier that provides essential structural integrity and emolliency to high-performance skincare.

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References

Sources