5-Chloro-6-hydroxynicotinonitrile (CAS NO.19840-46-1) is also named as 5-Chloro-6-hydroxy-3-pyridinecarbonitrile ; Nicotinonitrile,5-chloro-6-hydroxy- (8CI) ; 3-Pyridinecarbonitrile,5-chloro-1,6-dihydro-6-oxo- .