Also Called: Tetrachloro-Isophthalonitrile; 1,3-Benzenedicarbonitrile, 2,4,5,6-tetrachloro-; chlorothalonil (ISO); tetrachloroisophthalonitrile; Chlorothalonil (ISO) [Tetrachloroisophthalonitrile];Chlorothalonil;chlorothalonil (ISO) tetrachloroisophthalonitrile;chlorothalonil (χλωροθαλονίλη) (ISO)· τετραχλωροϊσοφθαλονιτρίλιο;BENZENE-1,3-DICARBONITRILE, 2,4,5,6-TETRACHLORO-, (CHLOROTHALONIL);CHLOROTHALONIL [1,3-BENZENEDICARBONITRILE,2,4,5,6-TETRACHLORO-]