Sodium isethionate is an amphoteric detergent used in detergent bar soaps.
It makes a dense lather in addition to the lather made by
the soap. It is mild on the skin, and non-drying.
Sodium isethionate works equally well in soft or hard water.
It is also an anti-static agent in shampoos.
Sodium cocoyl isethionate is a related amphoteric detergent
used in mild bath soaps, toothpastes, and baby soaps.
sodium isethionate: InChI=1/C2H6O4S.Na/c3-1-2-7(4,5)6;/h3H,1-2H2,(H,4,5,6);/q;+1/p-1/fC2H5O4S.Na/q-1;m