Sodium Cocoyl Isethionate is a mild and gentle solid surfactant derived from coconuts. It has been in use for a number of years but more recently has become well known due to the increasing popularity of solid shampoo bars also known as Syndet Shampoo Bars.
As SCI Solid Surfactant has limited solubility in water it may recrystallise if used in a liquid shampoo.
SCI Solid Surfactant performs well in hard water areas and is biodegradable. It has a minimum of 82% active ingredient and a pH of 6 so formulae do not usually need pH adjusting.
The individual materials that make up Sodium Cocoyl Isethionate are listed on the Cosmetic Ingredient Database (Cosing) and can be found here.