The Collaborative International Dictionary
HOC2H4SO3H
Isethionic \I*seth`i*on"ic\, a. [Is- + ethionic.] (Chem.) Pertaining to, derived from, or designating, an acid, HO.C2H4.SO3H, obtained as an oily or crystalline substance, by the action of sulphur trioxide on alcohol or ether. It is derivative of sulphuric acid.