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SODIUM COCOYL SARCOSINATE.

Valuable CAS 61791-59-1 / CLEANSING, HAIR CONDITIONING, SURFACTANT - CLEANSING

Sodium Cocoyl Sarcosinate is a mild, anionic surfactant derived from coconut fatty acids and sarcosine, valued for its gentle cleansing properties. It effectively emulsifies oils and dirt to facilitate their removal, while also contributing to foam enhancement and hair conditioning.

Summary

cleansing hair conditioning surfactant foam booster emulsifying

Science

Mechanism of Action

This ingredient functions by significantly lowering the surface tension of liquids, which enables the stable mixing of oil and water. This action is crucial for cleansing skin, hair, or teeth by lifting and washing away dirt and oily impurities. It serves as a gentle cleansing agent that purifies without compromising the skin's natural moisture barrier, acts as a foam booster to create a rich lather, and provides hair conditioning benefits. Furthermore, it possesses the capacity to enhance the dermal penetration of other cosmetic ingredients.

Research

Clinical Evidence

High confidence
Effective range 0.1–12.9%
Optimal

Up to 5% in leave-on products; up to 12.9% in rinse-off products for effective cleansing.

Key findings

  1. 01 Clinical irritation and sensitization studies indicate safety for leave-on applications at concentrations up to 5%.
  2. 02 Reported as safe for use in rinse-off products, with concentrations up to 12.9% found in soaps.
  3. 03 A 10% concentration demonstrated slight, temporary ocular irritation in rabbits at neutral or slightly acidic pH, without causing permanent corneal damage.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 6 – 8
0 7 14

Stability

Highly soluble in water and stable within a pH range of 6.0 to 8.0. It exhibits good compatibility with a variety of other surfactants, including nonionic and amphoteric types.

Synergies

  • Nonionic surfactants
  • Amphoteric surfactants

Conflicts

  • Ingredients capable of forming N-nitroso compounds, due to sarcosine's potential to react.
  • Ingredients whose safety profiles rely on limited dermal absorption, given Sodium Cocoyl Sarcosinate's penetration-enhancing capabilities.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
5% in leave-on products; up to 12.9% in rinse-off products%
Sensitization risk Low

The CIR Expert Panel considers Sodium Cocoyl Sarcosinate safe for use under specific conditions. Formulators must ensure products prevent the formation of N-nitroso compounds, as sarcosine can lead to N-nitrososarcosine. Due to its ability to enhance dermal penetration, caution is advised when co-formulating with ingredients whose safety is predicated on minimal skin absorption. Insufficient data exist to support its safety in products with high inhalation risk. All products containing this ingredient must be formulated to be non-irritating. It is recognized as non-comedogenic and non-phototoxic.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Sodium Cocoyl Sarcosinate is a valuable, gentle surfactant for effective cleansing and lathering across all skin types, provided specific formulation precautions regarding N-nitroso compounds and penetration enhancement are meticulously observed to ensure safety.

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