1,1,2,2-Tetracyanoethene 1,1,2,2-Tetracyanoethylene 51778-96-2 56875-27-5 670-54-2 AI3-28756 CCRIS 2643 EINECS 211-578-0 Ethene, tetracyano- Ethenetetracarbonitrile Ethylenetetracarbonitrile NSC 24833 TCNE TETRACYANOETHYLENE Tetracyanoethene Tetrakyanethylen [Czech] delta(sup 2,2')-Bimalononitrile delta2,2'-Bimalononitrile