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Moumoujus

SODIUM STEARIC ACID SULFATE.

Valuable CAS 68331-91-9 / SOLVENT, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

Sodium Stearic Acid Sulfate, often identified as Sodium Stearyl Sulfate, functions as a potent surfactant. This ingredient is adept at lowering surface tension, facilitating effective cleansing, and ensuring the stable blending of oil and water phases within cosmetic emulsions.

Summary

Cleansing Emulsifying Foaming Surfactant

Science

Mechanism of Action

This compound acts primarily as a surfactant by leveraging its amphiphilic structure, which incorporates both lipophilic (oil-attracting) and hydrophilic (water-attracting) components. This enables it to efficiently emulsify lipids and aqueous phases, effectively lifting and removing surface impurities such as dirt and sebum, while also contributing to the stability of emulsion-based products.

Research

Clinical Evidence

Low confidence
Effective range 0.1–29%
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

As an alkyl sulfate, Sodium Stearic Acid Sulfate demonstrates sensitivity to highly acidic environments (pH below 5) and elevated temperatures exceeding 40°C, conditions that can lead to hydrolytic decomposition.

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
29%
Sensitization risk Moderate

The Cosmetic Ingredient Review (CIR) Expert Panel has determined Sodium Stearyl Sulfate, alongside related alkyl sulfates, to be safe for use in cosmetic formulations, provided they are developed to be non-irritating. Usage concentrations typically span from 0.1% to 29%.

Your Skin

Skin Compatibility

Yes Normal
No Dry
Yes Oily
No Sensitive
Irritancy Moderate
Comedogenicity Low

Our Assessment

Verdict

Valuable

A valuable surfactant and emulsifier for diverse cosmetic applications, efficacious in cleansing and stabilizing product textures, though precise formulation is essential to mitigate potential irritation, particularly for sensitive skin profiles.

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