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TEA-LAUROYL SARCOSINATE.

Valuable CAS 16693-53-1 / ANTISTATIC, CLEANSING, FOAMING, HAIR CONDITIONING, SURFACTANT - CLEANSING

TEA-Lauroyl Sarcosinate is a mild anionic surfactant derived from coconut fatty acid and sarcosine, valued for its exceptional cleansing, foaming, and conditioning properties. It efficiently emulsifies oils and impurities, making it an effective ingredient for both skin and hair formulations, particularly where gentleness and foam stability are desired.

Summary

Antistatic Cleansing Emulsifying Foaming Hair conditioning Surfactant

Science

Mechanism of Action

This ingredient functions primarily as a surfactant, significantly reducing the surface tension between liquids to facilitate the mixing of oil and water. This action allows it to effectively cleanse skin and hair by emulsifying and lifting away dirt, sebum, and environmental pollutants. It also enhances foam formation and acts as an emulsifier within cosmetic formulations. Beyond cleansing, TEA-Lauroyl Sarcosinate imparts antistatic and hair conditioning benefits, promoting soft, shiny, and manageable hair. It is known to improve overall formula mildness and can mitigate the potentially irritating effects of other cleansing agents.

Research

Clinical Evidence

Medium confidence
Effective range ≤15%
Optimal

N/A

Key findings

  1. 01 The CIR Safety Assessment found that acyl sarcosines and their salts, including TEA-Lauroyl Sarcosinate, are safe for use at concentrations up to 5% in leave-on products and up to 15% in rinse-off products.
  2. 02 Clinical studies on Sodium Lauroyl Sarcosinate, a closely related compound, at concentrations of 2-5% demonstrated non-irritating and non-sensitizing properties.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 5 – 9
0 7 14

Stability

TEA-Lauroyl Sarcosinate demonstrates good chemical stability across a pH range of 5 to 9, making it suitable for wash bases with slightly acidic to moderately alkaline characteristics. Related sarcosinates show resistance to hydrolysis up to 100°C. However, it can potentially enhance the dermal penetration of other ingredients.

Synergies

  • Enhances formula mildness
  • Boosts foam stability and volume
  • Reduces irritation from other surfactants

Conflicts

  • Strong oxidizing agents
  • Conditions promoting N-nitroso compound formation (sarcosine can form N-nitrososarcosine, a known animal carcinogen)

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
15% in rinse-off products; 5% in leave-on products%
Sensitization risk Low

The CIR Expert Panel deems TEA-Lauroyl Sarcosinate safe when used in rinse-off products and in leave-on products at concentrations not exceeding 5%. Critical restrictions apply regarding its use in formulations where N-nitroso compounds could potentially form, due to the nitrosation risk of sarcosine. Formulations containing this ingredient must also be designed to be non-irritating. It is approved under Annex III of the EC Cosmetics Regulation, subject to purity criteria and concentration limits to prevent nitrosamine formation. Related sarcosinates are FDA-approved as indirect food additives.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

TEA-Lauroyl Sarcosinate is a valuable cleansing and conditioning surfactant, offering mild yet effective performance across diverse skin and hair types when formulated responsibly within established safety guidelines.

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