Science
Mechanism of Action
This anionic surfactant functions by efficiently forming micelles that bind to both water-soluble and lipid-based substances on the skin, such as dirt, excess oil, and makeup. This emulsifying action enables these impurities to be easily rinsed away, leaving the skin thoroughly cleansed without stripping its essential moisture.
Research
Clinical Evidence
Medium confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The raw ingredient typically presents with a pH between 5 and 7. For optimal product stability, particularly in liquid formulations, the final product's pH should be maintained within a range of 4.5 to 8.5 to prevent hydrolysis. While water-soluble, it often requires co-surfactants, such as amphoteric types, and gentle heating to achieve a smooth, fully incorporated solution.
Synergies
- Amphoteric co-surfactants, to enhance solubility and ease of incorporation into aqueous systems.
Conflicts
- Other harsh surfactants or strong skin irritants, as these may negate its mild cleansing benefits.
- Formulations with a pH below 6 for liquid products, which can induce hydrolysis and compromise stability.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has concluded that isethionate salts, including Sodium Cocoyl Methyl Isethionate, are safe for use in cosmetics under current practices and concentrations, provided they are formulated to be non-irritating. It is approved for concentrations up to 50% in rinse-off products and up to 17% in leave-on products. Toxicokinetic studies indicate that its micelles do not contribute to skin penetration or disrupt the skin barrier.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Sodium Cocoyl Methyl Isethionate is a valuable, mild surfactant that delivers efficient cleansing and a luxurious lather, suitable for all skin types without compromising skin barrier integrity.
Related
Similar Ingredients
Finding similar ingredients…