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SODIUM MYRISTYL SULFATE.

Valuable CAS 1191-50-0 / CLEANSING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

Sodium Myristyl Sulfate is an anionic surfactant primarily valued for its cleansing and emulsifying properties. It efficiently reduces surface tension, facilitating the removal of lipid-based impurities from the skin and hair. This ingredient also plays a crucial role in stabilizing formulations by enabling the homogeneous blend of immiscible aqueous and oil components.

Summary

Cleansing Emulsifying Surfactant

Science

Mechanism of Action

Functioning as an anionic surfactant, Sodium Myristyl Sulfate decreases the interfacial tension between liquids and solids. This action allows it to encapsulate and lift oils, fats, and dirt particles from the skin and hair, making them easily washable. Furthermore, its emulsifying capability ensures the stability of cosmetic mixtures by maintaining a homogeneous dispersion of oil and water phases.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

No specific optimal pH range for stability was identified. This ingredient is typically employed in conjunction with other surfactants to achieve balanced performance in terms of cleansing, foaming, and skin tolerance. It is important to note that, being a non-ethoxylated sulfate, Sodium Myristyl Sulfate does not pose concerns regarding 1,4-dioxane release, which is typically associated with ethoxylated counterparts like Sodium Myreth Sulfate.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
1%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has affirmed Sodium Myristyl Sulfate, alongside similar alkyl sulfates, as safe for use in cosmetics. The U.S. FDA lists it as a Food Contact Substance, and the EPA classifies it as a safer chemical, indicating low concern. While structurally related ingredients like Sodium Lauryl Sulfate have specific concentration guidelines (up to 1% for leave-on products), Sodium Myristyl Sulfate itself is broadly deemed safe for use. It is crucial to distinguish this non-ethoxylated compound from ethoxylated sulfates, which may be associated with 1,4-dioxane impurities; Sodium Myristyl Sulfate is not implicated in such concerns.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Sodium Myristyl Sulfate is a valuable surfactant and cleansing agent, safely utilized to effectively remove impurities and stabilize emulsions across a range of cosmetic formulations.

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