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Moumoujus

SODIUM MYRETH SULFATE.

Valuable CAS 25446-80-4 / CLEANSING, FOAMING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

Sodium Myreth Sulfate is an anionic surfactant widely employed in cosmetic formulations for its robust cleansing, foaming, and emulsifying properties. It effectively removes impurities while contributing to stable product textures and rich lather.

Summary

cleansing emulsifying foaming surfactant

Science

Mechanism of Action

This ingredient functions as an anionic surfactant, utilizing its dual-nature molecular structure to reduce the surface tension of liquids. Its hydrophobic segment binds with oils and debris, while its hydrophilic portion allows for easy rinsing with water. It stabilizes immiscible liquids like oil and water and generates foam by encapsulating gas bubbles.

Research

Clinical Evidence

Medium confidence
Effective range 3–25%
Optimal

N/A

Key findings

  1. 01 Formulations typically incorporate Sodium Myreth Sulfate at recommended levels between 3% and 20%.
  2. 02 As a principal active ingredient, it is commonly found in concentrations of 10-25% in mild cleansing products such as baby shampoos and shower gels.
  3. 03 It is important to note that concentrations at or above 7% have been observed to potentially cause skin or eye irritation, especially with prolonged or frequent application.

Transparency

Dusting Analysis

Not commonly dusted

Sodium Myreth Sulfate is provided in a liquid form, therefore it is not subject to dusting concerns during handling or formulation processes.

The Formula

Formulation

Solubility
Water
Optimal pH 7.5 – 8.5
0 7 14

Stability

The ingredient demonstrates optimal stability and performance in an aqueous solution with a pH between 7.5 and 8.5. While pH variations may alter foam structure, they do not impede its foaming ability. Careful formulation is essential to mitigate potential skin or eye irritation, particularly for individuals with dry or sensitive skin, when used frequently or in higher concentrations.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Unknown

The Cosmetic Ingredient Review (CIR) Expert Panel has determined Sodium Myreth Sulfate to be safe for cosmetic use, provided formulations ensure it is non-irritating. Like other ethoxylated compounds, it may contain trace amounts of 1,4-dioxane, a potential carcinogen; however, the FDA affirms that levels typically found in cosmetics are not hazardous to consumers.

Your Skin

Skin Compatibility

Yes Normal
No Dry
Yes Oily
No Sensitive
Irritancy Medium
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

Sodium Myreth Sulfate is a valuable surfactant, offering strong cleansing, foaming, and emulsifying capabilities, but its medium irritancy necessitates precise formulation to ensure skin compatibility, especially for dry and sensitive skin types.

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