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Moumoujus

C30-50 PARETH-10.

Valuable CAS 246538-85-2 / SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

An advanced, high-molecular-weight synthetic emulsifier and surfactant that facilitates the union of oil and water phases. It is specifically engineered to create sophisticated 'gel networks,' resulting in ultra-stable emulsions with a refined, silk-like skin feel.

Summary

Emulsifying Agent Surfactant Thickener Texture Enhancer

Science

Mechanism of Action

As a non-ionic surfactant, it utilizes a dual-ended molecular structure—a long hydrophobic C30-50 carbon chain and a hydrophilic PEG-10 head—to reduce surface tension. When integrated with fatty alcohols, it builds a microscopic crystalline lattice that traps water, significantly increasing formula viscosity and preventing phase separation without the tackiness of traditional waxes.

Research

Clinical Evidence

High confidence
Effective range 0.1–15%
Optimal

2%

Key findings

  1. 01 A 2012 Cosmetic Ingredient Review (CIR) assessment of 131 alkyl PEG ethers concluded that C30-50 Pareth-10 is safe for cosmetic use when formulated to be non-irritating.
  2. 02 Human Repeated Insult Patch Tests (HRIPT) on analogous PEG ethers demonstrated that while concentrations up to 25% may cause slight irritation, they remain non-sensitizing to human skin.

Transparency

Dusting Analysis

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

As a functional texturizer and stabilizer rather than a 'hero active,' this ingredient is rarely 'dusted.' However, levels below 0.1% likely indicate it is used merely as a processing aid rather than for its structural emulsification benefits.

The Formula

Formulation

Solubility
Both
Optimal pH 3 – 9
0 7 14

Stability

Exhibits exceptional thermal stability with a melting point near 99°C. It is highly compatible with anionic, cationic, and non-ionic surfactant systems.

Synergies

  • Fatty alcohols (Cetyl/Stearyl)
  • Mineral pigments
  • UV filters

Conflicts

  • None major

Safety

Safety Profile

CIR Status
Safe as used
Max tested
15%
Pregnancy
Safe
Sensitization risk Low

Safe for topical application; primary safety considerations involve ensuring the final formulation is pH-balanced to avoid the mild irritation potential seen at high concentrations.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

A high-performance structural ingredient that enables the creation of elegant, heat-stable textures and superior pigment dispersion.

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