For starters, a Chemical Abstracts search for the title compound 1, CH2˭CH‒S‒S‒CH˭CH2, RN [15805-34-2], is beset with many difficulties. Online, a search in the CA file retrieved Ref.4plus two false drops, Ref.5(which deals with diallyl disulfide) and Ref.6(which refers to “ethylene disulfide”, (C2H4SS)n). A subsequent search in the CAOLD file provided Ref.2Thus, Refs.1,3can only be found in the paper edition of Chemical Abstracts.