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Moumoujus

TEA-LAURETH SULFATE.

Valuable CAS 27028-82-6 / CLEANSING, FOAMING, SURFACTANT - CLEANSING, SURFACTANT - EMULSIFYING

TEA-Laureth Sulfate is an anionic surfactant primarily valued for its robust cleansing, foaming, and emulsifying capabilities in cosmetic formulations. It effectively reduces surface tension, facilitating the removal of impurities from skin and hair.

Summary

Cleansing Foaming Surfactant Emulsifying

Science

Mechanism of Action

This ingredient functions by decreasing the surface tension of water, which aids in the emulsification and dispersion of oils, dirt, and other impurities, allowing for their efficient removal. Concurrently, it contributes to the formation of a rich and stable lather in cleansing products.

Research

Clinical Evidence

High confidence
Effective range 0–10.5%
Optimal

10.5%

Key findings

  1. 01 Clinical studies demonstrated that shampoos formulated with TEA-Laureth Sulfate at concentrations up to 10.5% caused no irritation.
  2. 02 Concentrations exceeding 10.5% were observed to potentially induce irritation with prolonged skin contact.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 5 – 8.5
0 7 14

Stability

TEA-Laureth Sulfate maintains stability in alkaline, weak acid, and hard water environments, with an optimal pH range for stability between 5.0 and 8.5. It is susceptible to hydrolysis and instability in strong acidic conditions. Typically supplied as a 35-40% active aqueous solution, its cleansing performance and viscosity are influenced by the number of ethoxy units.

Conflicts

  • Strong acids (due to hydrolysis)
  • Nitrate or other nitrosating agents (potential formation of nitrosoamines)

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
10.5%
Sensitization risk Moderate

The CIR Expert Panel concluded TEA-Laureth Sulfate is safe for cosmetic use when formulated to be non-irritating and at concentrations not surpassing 10.5%. Higher concentrations or extended skin exposure may lead to irritation. Its use should be avoided in products where N-nitroso compounds might form, as it can generate nitrosoamines in the presence of nitrosating agents. The ingredient may contain trace amounts of diethanolamine (DEA); in the EU, while TEA-Laureth Sulfate itself is not specifically regulated, Triethanolamine levels in cosmetic products are limited to 2.5%.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

TEA-Laureth Sulfate is a valuable cleansing and foaming agent, particularly for rinse-off products, provided it is precisely formulated within its maximum concentration of 10.5% and adheres to safety considerations regarding potential irritancy and nitrosoamine formation.

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