Synonyms: Isophthalonitrile,2,4,5-trichloro-6-hydroxy- (8CI); 1,3-Dicyano-4-hydroxy-2,5,6-trichlorobenzene;2,4,5-Trichloro-6-hydroxy-1,3-benzenedicarbonitrile;2,5,6-Trichloro-4-hydroxy-1,3-benzenedicarbonitrile;4-Hydroxy-2,5,6-trichloroisophthalonitrile; Hydroxychlorothalonil; SDS 3701