Also Called: Acetylene Dichloride; 1,2-Dichloroethene (cis and trans); 1,2-Dichloroethylene sym; 1,2-Dichloroethylene (Note: see also CAS No. 156-59-2 and 156-60-5);1,2-Dichloroethylene;1,2-Dichlorethen (cis und trans);Ethene, 1,2-dichloro-;Dichloroethylenes