Get a Free 5ml Mini Now Free 5ml Mini With Every Order of The Mantle
Moumoujus

SODIUM COCOYL ISETHIONATE.

Valuable CAS 61789-32-0 / 58969-27-0 / CLEANSING, HAIR CONDITIONING, SURFACTANT - CLEANSING

Sodium Cocoyl Isethionate (SCI) is a gentle anionic surfactant derived from coconut fatty acids, recognized for its effective cleansing properties. It produces a rich, stable lather without stripping the skin's natural moisture, making it highly suitable for mild cleansing formulations. This ingredient is well-regarded for its mildness and broad skin compatibility.

Summary

Surfactant/Cleansing

Science

Mechanism of Action

As an anionic surfactant, Sodium Cocoyl Isethionate functions by bridging water and oil phases. It binds with hydrophobic elements like dirt, grime, and excess sebum, allowing them to be emulsified and easily rinsed away from the skin and hair. This mechanism ensures thorough cleansing while preserving the skin's natural moisture barrier, resulting in a gentle and non-drying experience.

Research

Clinical Evidence

High confidence
Effective range 3–25%
Optimal

N/A

Key findings

  1. 01 Clinical tests indicate Sodium Cocoyl Isethionate is less irritating to the skin compared to Sodium Lauryl Sulfate (SLS).
  2. 02 Typical usage rates in facial cleansers range from 3-10%, while shampoos often incorporate 3-15%.
  3. 03 Body washes and shower gels typically utilize concentrations of 5-20%.
  4. 04 For solid formulations like shampoo and cleansing bars, concentrations can be higher, ranging from 20-60%.
  5. 05 The general concentration range observed in various skincare products is 10-25%.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 6 – 8
0 7 14

Stability

Sodium Cocoyl Isethionate exhibits optimal stability within a pH range of 6.0 to 8.0. Outside this range, particularly under extreme pH or high temperature conditions, it can undergo hydrolysis (breakdown). Due to its limited water solubility and susceptibility to hydrolysis in acidic liquid environments (below pH 6), it is often better suited for solid or bar formulations. In liquid products, it can be dissolved by combining with an amphoteric surfactant and heating. The inclusion of 0.1-0.5% chelating agents, such as EDTA, can enhance product stability and extend shelf life by sequestering transition metals.

Synergies

  • Chelating agents (e.g., EDTA) for enhanced stability and shelf life
  • Liquid amphoteric surfactants for dissolution in liquid formulations

Conflicts

  • Strong oxidizers
  • Extreme heat
  • pH levels outside of 6.0-8.0 (for long-term stability)
  • Other harsh surfactants (may diminish its mild benefits)

Safety

Safety Profile

CIR Status
Safe as used
Max tested
53%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel has determined that isethionate salts, including Sodium Cocoyl Isethionate, are safe for use in cosmetics under current practices and concentrations. This conclusion is contingent on the ingredient being formulated to be non-irritating. The highest reported concentration of use is 53% in rinse-off products and 17% in leave-on products.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Sodium Cocoyl Isethionate is a valuable, mild cleansing agent compatible with all skin types, effectively removing impurities without compromising skin barrier integrity.

Related

Similar Ingredients

Finding similar ingredients…

References

Sources