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SODIUM HYDROGENATED COCOYL METHYL ISETHIONATE.

Valuable CAS - / CLEANSING, SURFACTANT - FOAM BOOSTING

Sodium Hydrogenated Cocoyl Methyl Isethionate is a gentle, coconut-derived anionic surfactant valued for its effective cleansing and robust foam-boosting capabilities. It efficiently lifts impurities from the skin and hair while contributing to a luxurious lather, helping to preserve the skin's natural moisture balance.

Summary

Cleansing Surfactant - Foam Boosting

Science

Mechanism of Action

Operating as a mild anionic surfactant, Sodium Hydrogenated Cocoyl Methyl Isethionate facilitates the emulsification of oil and water, enabling the effective removal of dirt and sebum. It significantly reduces surface tension and enhances foam volume and stability, contributing to a rich lather that cleanses thoroughly without inducing excessive dryness or disrupting the skin's natural barrier.

Research

Clinical Evidence

Medium confidence
Effective range ≤50%
Optimal

N/A

Key findings

  1. 01 The Cosmetic Ingredient Review (CIR) Expert Panel concluded that isethionate salts, including Sodium Hydrogenated Cocoyl Methyl Isethionate, are safe in rinse-off products at concentrations up to 50% and in leave-on products up to 17%, provided they are formulated to be non-irritating. Clinical testing of Sodium Cocoyl Isethionate, a closely related ingredient, demonstrated irritation at 2.9% but was found to be less irritating than Sodium Lauryl Sulfate (SLS).

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 4.5 – 8
0 7 14

Stability

This ingredient exhibits excellent stability in both hot and cold water and is resistant to hard water conditions. While stable in formulations at near-neutral pH and room temperatures for extended durations, it can undergo gradual hydrolysis at elevated temperatures. In hydrous (liquid) formulations, instability and breakdown may occur at a pH below 6.

Conflicts

  • Hydrolyzes in liquid formulations with a pH below 6

Safety

Safety Profile

CIR Status
Safe as used
Max tested
50%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has determined that isethionate salts, including Sodium Hydrogenated Cocoyl Methyl Isethionate, are safe for cosmetic use when formulated to be non-irritating. Toxicokinetics studies on a related compound suggest that its micelles do not significantly penetrate the skin or perturb the skin barrier, supporting its mild profile. However, it is important to note that some 'natural' or 'organic' certifications (e.g., Cosmébio) prohibit its use due to the manufacturing process involving ethoxylation, which carries a potential risk of 1,4-dioxane contamination.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

This highly effective, mild surfactant is valuable for developing cleansing products that deliver a luxurious foam and leave skin feeling clean without stripping essential moisture, provided it is formulated carefully to minimize any potential for irritation.

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