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

SODIUM LAUROYL ISETHIONATE.

Valuable CAS 7381-01-3 / ANTISTATIC, CLEANSING, FOAMING, HAIR CONDITIONING, SKIN CONDITIONING, SURFACTANT - CLEANSING

Sodium Lauroyl Isethionate is an exceptionally mild, anionic surfactant derived from sustainable coconut or palm oils. It functions as an effective cleansing agent by emulsifying oils and suspending impurities, while simultaneously offering beneficial skin and hair conditioning properties.

Summary

Cleansing Surfactant Skin Conditioning Hair Conditioning Antistatic

Science

Mechanism of Action

As an anionic surfactant, Sodium Lauroyl Isethionate functions by significantly lowering the surface tension of cosmetic formulations. This action facilitates the emulsification of oils and fats, effectively suspending dirt particles and enabling their removal from skin and hair surfaces. Beyond its primary cleansing role, it acts as a conditioning agent, helping to maintain skin health and enhancing hair's combability, softness, shine, and volume. Its reportedly large molecular size contributes to its mildness by preventing deep epidermal penetration, and it also exhibits antistatic properties.

Research

Clinical Evidence

High confidence
Effective range 3–30%
Optimal

N/A

Key findings

  1. 01 Deemed safe for use in rinse-off cosmetic formulations at concentrations up to 50%, provided the formulation is non-irritating.
  2. 02 Deemed safe for use in leave-on cosmetic formulations at concentrations up to 17%, provided the formulation is non-irritating.
  3. 03 Recommended usage rate in formulations ranges from 3% to 30%.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 6 – 8
0 7 14

Stability

Sodium Lauroyl Isethionate demonstrates stability in aqueous formulations at ambient temperatures within a pH range of 6.0 to 8.0. It is fully soluble in hot water, partially soluble in cold water, and can be dispersed effectively in both soft and hard water.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
50%
Sensitization risk Low

The Cosmetic Ingredient Review (CIR) Expert Panel concluded that isethionate salts, including Sodium Lauroyl Isethionate, are safe as cosmetic ingredients under current use practices and concentrations, provided formulations are non-irritating. This safety determination covers concentrations up to 50% in rinse-off products and 17% in leave-on products. It holds a low concern rating from the EWG regarding cancer, allergies, immunotoxicity, and reproductive toxicity. Environment Canada classifies it as not expected to be toxic, harmful, persistent, or bioaccumulative. Formulators should be aware of the potential for trace amounts of ethylene oxide and 1,4-dioxane if isethionic acid is manufactured using ethylene oxide.

Your Skin

Skin Compatibility

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

Our Assessment

Verdict

Valuable

Sodium Lauroyl Isethionate is a valuable anionic surfactant, delivering highly effective yet gentle cleansing and conditioning suitable for all skin types, making it an excellent choice for a wide range of precision skincare and haircare formulations.

Related

Similar Ingredients

Finding similar ingredients…