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SODIUM LAURETH-8 CARBOXYLATE.

Valuable CAS 33939-64-9 / CLEANSING, SURFACTANT - CLEANSING

Sodium Laureth-8 Carboxylate is a gentle anionic surfactant and cleansing agent. It adeptly reduces surface tension to emulsify oil and water, enabling effective removal of dirt and impurities from the skin. This ingredient also functions as a stable foaming agent.

Summary

Cleansing Agent Surfactant Foaming Agent Emulsifier

Science

Mechanism of Action

As an anionic surfactant, Sodium Laureth-8 Carboxylate acts by lowering the surface tension between different formulation components, facilitating the mixing of oil and water phases. This action enables it to efficiently attract and lift dirt, excess sebum, and other impurities from the skin's surface for thorough cleansing. It further contributes to the sensory experience by generating a stable foam.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 A cleanser formulated with sodium laureth carboxylate and alkyl carboxylates effectively cleansed facial sebum without contributing to skin dryness.

Transparency

Dusting Analysis

Not commonly dusted

This ingredient is a liquid surfactant and is not typically handled as a dry powder, thus 'dusting' is not a relevant concern for its formulation.

The Formula

Formulation

Solubility
Water
Optimal pH 3 – 9
0 7 14

Stability

The ingredient, or its related carboxylic acid, demonstrates significant stability across a wide pH range of 3 to 9. The foam generated by general Sodium Laureth Carboxylates maintains stability irrespective of formulation pH, offering broad formulation flexibility. However, an optimal pH range of 6.0–8.0 is often recommended for enhanced compatibility with other ingredients.

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
15%
Sensitization risk Low

A direct safety assessment by the Cosmetic Ingredient Review (CIR) or the Scientific Committee on Consumer Safety (SCCS) specifically for Sodium Laureth-8 Carboxylate has not been located. The FDA does not mandate pre-market approval for cosmetic ingredients. This ingredient, as part of the Sodium Laureth-X Carboxylate family, is generally noted for its exceptional mildness. In cosmetic rinse-off products, concentrations up to 15% are not considered to pose an unreasonable risk of skin irritation. While undiluted forms can be a severe eye irritant, irritation severity significantly diminishes at concentrations below 10%. General warnings associated with the broader Sodium Laureth Carboxylate category regarding potential irritation, dehydration, or impurities should be distinguished from the properties of this specific mild variant.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Unknown

Our Assessment

Verdict

Valuable

Sodium Laureth-8 Carboxylate is a valuable, mild cleansing and foaming agent, suitable for a wide array of skin types, offering effective purification in rinse-off formulations without contributing to skin dryness.

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