Ammonium Cocoyl Isethionate

What is Ammonium Cocoyl Isethionate?

Ammonium Cocoyl Isethionate is an anionic surfactant made from fatty acids sourced from coconut oil, combined with isethionic acid and ammonium. It belongs to the isethionate family, prized in rinse-off personal care products like shampoos, body washes, facial cleansers, and bubble baths. In formulations, it acts by decreasing the surface tension between water, oils, and dirt, allowing micelles to encapsulate impurities for easy rinsing. This process enables effective cleansing and stable lather without overly disrupting the skin's natural lipid barrier. Compared to harsher sulfate-based options, its structure imparts a creamy texture and reduced irritation potential, making it a staple in mild, consumer-friendly cleansing systems. It performs well in both high and low pH environments, enhancing product versatility.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 1 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Surfactant
Lowers surface tension to enable cleansing, emulsifying, and foaming; central to shampoos, body washes, and many emulsions and micellar systems.
Cleansing agent
Removes dirt, oil, and impurities by lowering surface tension and forming micelles, enabling soils to be lifted and rinsed away from skin, hair, or teeth.

Benefits

Delivers thorough yet gentle cleansing action.

Produces rich, stable foam for pleasant use.

Helps maintain skin's moisture balance during washing.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Individuals with sensitive or reactive skin.
Anyone with rare allergies to coconut-derived ingredients.
People preferring sulfate-free cleansing options.
Persons sensitive to ammonium compounds.
Those with dry skin needing mild surfactants.
Individuals experiencing irritation from any surfactant.

Safety Notes

  • Assessed as safe for cosmetic use by expert reviews.
  • Rated low hazard by environmental health databases.

Frequently Asked Questions about Ammonium Cocoyl Isethionate

What makes it different from sulfates?

Its isethionate structure offers milder cleansing with less potential for dryness.

Is it suitable for baby products?

Commonly used in gentle formulas due to low irritation profile.

Does it cause comedones?

Rated non-comedogenic, unlikely to clog pores.