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SODIUM MYRISTOYL SARCOSINATE.

Valuable CAS 30364-51-3 / ANTISTATIC, CLEANSING, FOAMING, HAIR CONDITIONING, SURFACTANT - CLEANSING, VISCOSITY CONTROLLING

Sodium Myristoyl Sarcosinate is a gentle, multi-functional amino acid-derived surfactant recognized for its mild cleansing properties. It effectively removes dirt and impurities while simultaneously delivering emollient benefits, leaving skin and hair feeling soft and moisturized. This ingredient is highly valued for its conditioning capabilities and low potential for irritation across various formulations.

Summary

Cleansing Emollient Hair Conditioning Surfactant Viscosity Controlling

Science

Mechanism of Action

This ingredient operates as a co-surfactant, significantly enhancing and stabilizing foam in cleansing formulations, which facilitates the removal of dirt, oil, and impurities. Its inherent emollient properties contribute to a soft, moisturized feel on both skin and hair post-application. In hair care, it improves attributes such as body, suppleness, sheen, and texture, and actively reduces static electricity buildup. Additionally, research suggests it may augment the transdermal penetration of other cosmetic ingredients.

Research

Clinical Evidence

High confidence
Effective range 0.9–5%
Optimal

Effective concentrations vary by product type; typically 0.9-3.5% in cleansing products (e.g., cold creams, lotions) and safely up to 5% in leave-on formulations, as supported by clinical irritation and sensitization studies.

Key findings

  1. 01 Clinical irritation and sensitization studies conducted as part of the CIR Expert Panel review.

Transparency

Dusting Analysis

Not commonly dusted

No data available in the provided research suggests this ingredient is commonly 'dusted' or has specific dusting thresholds.

The Formula

Formulation

Solubility
Water
Optimal pH N/A
0 7 14

Stability

Acyl sarcosines, including Sodium Myristoyl Sarcosinate, reliably form water-soluble salts within neutral to mildly acidic pH ranges. These salts exhibit enhanced solubility and are less impacted by water hardness compared to conventional soaps, contributing to stable formulations.

Synergies

  • Functions as a co-surfactant to improve and stabilize foam in cleansing systems.
  • Enhances the penetration of other active ingredients into the skin.

Conflicts

  • Must not be incorporated into cosmetic products where the formation of N-nitroso compounds is possible.

Safety

Safety Profile

CIR Status
Safe with restrictions
Max tested
5%
Sensitization risk Low

The CIR Expert Panel considers it safe for rinse-off applications and for leave-on products at concentrations up to 5%, which represents the highest level tested in clinical irritation and sensitization studies. However, data are insufficient to ascertain safety for products where inhalation is probable. The SCCS has highlighted that safety assessments often rely on structural analogues and requests original genotoxicity study reports. Formulators must ensure conditions do not lead to N-nitroso compound formation.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Sodium Myristoyl Sarcosinate is a valuable, gentle ingredient prized for its effective yet mild cleansing action, significant emollient properties, and broad compatibility across various skin types with a low risk of irritation or comedogenicity.

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