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Moumoujus

C12-13 PARETH-9.

Valuable CAS 66455-14-9 / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

A non-ionic surfactant and emulsifier derived from ethoxylated fatty alcohols that excels at solubilizing fragrances and essential oils in water-based formulations. Functions primarily as a cleansing agent and stabilizer, creating stable micro-emulsions that allow oil-soluble ingredients to disperse uniformly in aqueous solutions. While not a bioactive ingredient, it plays a crucial supporting role in formula stability and product performance.

Summary

Emulsifying Surfactant/cleansing Solubilizer Stabilizer

Science

Mechanism of Action

Reduces surface tension between oil and water phases by forming micelles that encapsulate lipophilic substances, enabling uniform dispersion of fragrances and oils in water-based products while assisting in the removal of sebum and impurities during cleansing

Research

Clinical Evidence

High confidence
Effective range 0.5–25%
Optimal

2%

Key findings

  1. 01 Comprehensive safety evaluation of 131 alkyl PEG ethers confirmed safety in current usage practices when formulated to be non-irritating

Transparency

Dusting Analysis

Not commonly dusted

As a functional excipient rather than active ingredient, dusting concerns are minimal - used at effective concentrations for emulsification and solubilization purposes

The Formula

Formulation

Solubility
Both
Optimal pH 3 – 10
0 7 14

Stability

Highly stable across broad pH range and temperature variations; non-ionic nature provides compatibility with cationic, anionic, and other non-ionic surfactants

Synergies

  • Other surfactants
  • Fragrances
  • Essential oils

Conflicts

  • Strong oxidizing agents
  • Extreme pH conditions outside 3-10 range

Safety

Safety Profile

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

Maximum 10% in leave-on products, 25% in rinse-off products. Requires purification to minimize 1,4-dioxane contamination from ethoxylation process

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

A reliable workhorse ingredient that enables stable, effective formulations by bridging oil and water phases, particularly valuable in fragrance-containing and cleansing products.

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