Get a Free 5ml Mini Now Free 5ml Mini With Every Order of The Mantle
Moumoujus

SODIUM TRIDECYL SULFATE.

Questionable CAS 3026-63-9 / CLEANSING, FOAMING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

Sodium Tridecyl Sulfate is an anionic surfactant primarily valued for its robust cleansing properties. It effectively reduces surface tension to emulsify oils and dirt, facilitating their removal from skin and hair in rinse-off formulations.

Summary

Cleansing Agent Foaming Agent Wetting Agent Emulsifier Dispersing Agent

Science

Mechanism of Action

As an anionic surfactant, Sodium Tridecyl Sulfate possesses an amphipathic structure, allowing it to lower the surface tension of liquids. This enables it to blend with oil and dirt, creating emulsions that can be easily rinsed away, thereby functioning as an effective cleansing, foaming, wetting, emulsifying, and dispersing agent.

Research

Clinical Evidence

Medium confidence
Effective range 0.1–29%
Optimal

N/A

Key findings

  1. 01 Clinical evaluations confirm its utility in rinse-off cosmetic applications, such as soaps and shampoos, within a concentration range of 0.1% to 29%.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

This ingredient exhibits stability in alkaline, weak acid, and hard water environments. However, it is unstable in strong acidic conditions, where it can undergo hydrolysis and reduction to alcohol.

Conflicts

  • Bases
  • Strong oxidizing agents
  • Strong acids

Safety

Safety Profile

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

The CIR Expert Panel has determined Sodium Tridecyl Sulfate to be safe when used in concentrations between 0.1% and 29%, specifically in rinse-off cosmetic formulations like soaps and shampoos. Safety assessments indicate a potential for skin and eye irritation, leading to recommendations against its use in children's cleaning products. It is listed on the FDA Inventory of Food Contact Substances (FCS) and its synonym is an ACTIVE chemical under EPA TSCA.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Questionable

While effective as a cleansing and foaming agent in rinse-off applications at concentrations up to 29%, its high irritancy profile and warnings for sensitive skin types make it a questionable choice for Moumoujus's precision skincare philosophy, especially outside of highly specific, carefully formulated rinse-off cleansers.

Related

Similar Ingredients

Finding similar ingredients…