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SODIUM C11-15 ALKYL SULFATE.

Valuable / CLEANSING, SURFACTANT - CLEANSING

Sodium C11-15 Alkyl Sulfate is a versatile surfactant widely utilized in cleansing formulations. It effectively reduces surface tension, enabling the thorough mixing of oil and water, and is instrumental in generating foam and stabilizing emulsions. Its diphilic structure allows it to cleanse skin and hair by lifting fat and soil particles.

Summary

surfactant/cleansing emulsifying foaming

Science

Mechanism of Action

As a surfactant, Sodium C11-15 Alkyl Sulfate operates by lowering the surface tension of liquids, facilitating the uniform dispersion of immiscible substances such as oil and water. This property makes it an effective cleansing agent, aiding in the removal of lipids and dirt from skin and hair. Its diphilic nature, involving a long hydrocarbon chain and a water-soluble head, allows it to dissociate in water and perform its surface-active functions.

Research

Clinical Evidence

Insufficient-data 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

Sodium alkyl sulfates are readily soluble in water, forming solutions typically exhibiting pH levels above 7.0, indicating basicity. These compounds demonstrate general stability during transport and do not react with water or common materials. Some related alkyl sulfates show stability across both acidic and alkaline conditions.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
29%
Sensitization risk Moderate

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that related alkyl sulfates, including Sodium C12-15 Alkyl Sulfate, are safe for use at concentrations ranging from 0.1% to 29% in rinse-off products like soaps and shampoos. For leave-on applications, a related ingredient, Sodium Sulfate, was initially deemed safe up to 1%, later updated to safe if formulated to be non-irritating, even up to 2% in some leave-on products. A sensitization study on a bubble bath formulation containing an effective 1.01% Sodium Sulfate reported mild erythema in one subject during the induction phase, with no subsequent reactions during the challenge phase, suggesting a moderate potential for irritation in some individuals. The FDA considers related alkyl sulfates as inert ingredients with tolerance exemptions in pesticide formulations and lists Sodium Sulfate as an inactive ingredient in approved drugs.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Sodium C11-15 Alkyl Sulfate is a valuable cleansing and foaming agent, particularly in rinse-off formulations, though its medium irritancy potential necessitates careful formulation to ensure skin comfort.

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