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Moumoujus

C11-15 PARETH-40.

Valuable CAS 173244-48-9 / CLEANSING, SURFACTANT - CLEANSING

A high-potency non-ionic surfactant with 40 moles of ethylene oxide, engineered to excel at solubilizing oil-based ingredients in water systems. This versatile emulsifier reduces surface tension while forming a lightweight conditioning film, making it particularly valuable in cleansing formulations and water-resistant products.

Summary

surfactant cleansing solubilizer emulsifying

Science

Mechanism of Action

Functions as a molecular bridge between water and oil phases by reducing surface tension through its amphiphilic structure. The high ethylene oxide content (40 moles) creates powerful solubilization capabilities for lipophilic substances while depositing a mild occlusive film that provides conditioning benefits to skin barrier function.

Research

Clinical Evidence

Medium confidence
Effective range ≤7.5%
Optimal

N/A

Key findings

  1. 01 Related C14-15 AE7 compounds at 25% concentration showed negligible to slight irritation in occlusive patch testing (International Journal of Toxicology, 2012)
  2. 02 C14-15 AE6.5 at 10% demonstrated only slight skin irritation, supporting low irritancy profile of high-molar Pareth ingredients (CIR Assessment, 2012)

Transparency

Dusting Analysis

Not commonly dusted

As a functional surfactant with established safety parameters, dusting is not a primary concern for this ingredient

The Formula

Formulation

Solubility
Water
Optimal pH 3 – 10
0 7 14

Stability

Demonstrates exceptional stability across broad pH ranges due to non-ionic character. Maintains performance integrity in high-salt environments and extreme pH conditions typical of hair and skin treatments.

Conflicts

  • N-nitrosating agents
  • Strong oxidizing agents

Safety

Safety Profile

CIR Status
Safe as used
Max tested
7.5%
Sensitization risk Low

CIR-approved when formulated to minimize irritation potential. The 7.5% limit applies specifically to leave-on applications within the Alkyl PEG Ether classification.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

A technically sound surfactant with broad compatibility and proven safety profile, offering reliable performance in complex formulation challenges.

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References

Sources