Sodium Cocoyl Isethionate is a mild surfactant often used in personal care products like shampoos, facial cleansers, and body washes. 

1. Chemical Structure: Sodium Cocoyl Isethionate is derived from coconut oil. Its chemical structure consists of a sodium salt ester of fatty acids from coconut oil combined with isethionic acid.

2. Function: It acts as a surfactant, which means it helps water to mix with oil and dirt, allowing them to be washed away. It produces a creamy lather that cleanses the skin and hair without stripping away natural oils.

3. Benefits: Sodium Cocoyl Isethionate is known for its gentle cleansing properties, making it suitable for sensitive and dry skin. It is also biodegradable and environmentally friendly.

4. Appearance: It is available in the form of white or light yellow powder, flakes, or granules.

5. Usage: It is commonly used in solid and liquid cleansers, shampoos, body washes, and facial cleansers to create a rich foam and provide a gentle cleansing experience.

6. Safety: Sodium Cocoyl Isethionate is generally considered safe for topical use but, as with any ingredient, some individuals may be sensitive or allergic to it. It is milder compared to some traditional surfactants.

7. Regulation: The use of Sodium Cocoyl Isethionate in cosmetics is regulated by various agencies to ensure its safety and proper use in cosmetic formulations.