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Moumoujus

C12-13 PARETH-15.

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

A non-ionic surfactant that bridges oil and water phases to create stable emulsions in skincare formulations. This moderate-chain alcohol ethoxylate serves as both an emulsifying agent and solubilizer, helping to incorporate oil-based actives and fragrances into water-based products without compromising skin barrier function.

Summary

surfactant emulsifying solubilizing cleansing

Science

Mechanism of Action

Features a dual molecular structure with a lipophilic C12-13 alkyl chain and hydrophilic 15-unit polyethylene glycol chain that reduces interfacial tension between oil and water phases, enabling stable emulsion formation and enhanced penetration of hydrophobic ingredients into aqueous formulations.

Research

Clinical Evidence

Medium confidence
Effective range 0.1–5%
Optimal

1.5%

Key findings

  1. 01 Successfully stabilized cationic silicone emulsions while providing enhanced conditioning benefits without environmental toxicity concerns
  2. 02 Effectively solubilized fragrance and oil components in aqueous formulations while preserving skin barrier integrity

Transparency

Dusting Analysis

Not commonly dusted

As a functional emulsifying ingredient rather than a marketing-driven active, it's rarely used in ineffective concentrations for cosmetic appeal

The Formula

Formulation

Solubility
Water
Optimal pH 3.5 – 8
0 7 14

Stability

Demonstrates excellent stability in acidic to neutral environments but vulnerable to hydrolysis under strongly alkaline conditions; HLB value of 15.2 indicates strong hydrophilic character

Synergies

  • Dimethiconol
  • fragrance oils
  • oil-based actives

Conflicts

  • Strongly alkaline ingredients
  • Strong oxidizing agents

Safety

Safety Profile

CIR Status
Safe as used
Max tested
5%
Pregnancy
Safe
Sensitization risk Low

CIR Expert Panel classified under Alkyl PEG Ethers group as safe for cosmetic use when formulated to minimize irritation potential

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

A reliable workhorse emulsifier that enables stable, well-tolerated formulations across all skin types with minimal irritation potential.

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References

Sources