Synonyms: 3,4-Dichlorobutene-1 (racemic mixture);1,2-Dichloro-3-butene (racemic mixture);4-01-00-00772 (Beilstein Handbook Reference);1-Butene, 3,4-dichloro- (racemic mixture);3,4-Dichlorobut-1-ene;3,4-Dichlorobutene-1;64037-54-3;1-Butene, 3,4-dichloro-, (+-)-;