alkylating agent ethyl sulfide bis(2-chloroethyl) sulfide mustard gas Iprit 1-chloro-2-[(2-chloroethyl)sulfanyl]ethane bis(2-chloroethyl)sulfane Lost 1,1'-thiobis(2-chloroethane) sulfur mustard bis(2-chloroethyl) sulphide Yperite bis(2-chloroethyl) sulfide Mustard gas 1-chloro-2-[(2-chloroethyl)sulfanyl]ethane 1-chloro-2-[(2-chloroethyl)thio]ethane Senfgas An ethyl sulfide that is diethyl sulfide in which a hydrogen from each of the terminal methyl groups is replaced by a chlorine. It is a powerful vesicant regulated under the Chemical Weapons Convention. organochlorine compound carcinogenic agent vesicant