The dynamics of the bromate-1,4-cyclohexanedione reaction and its ferroin catalyzed version in a continuously fed stirred tank reactor are reported. In the ([Br − ] 0 , [H 2 SO 4 ] 0 ) and ([Br − ] 0 , [ferroin] 0 ) planes steady-state bistability and oscillations are observed. Close to the upper [Br − ] 0 limit of the oscillatory domain the oscillations become aperiodic. By increasing the [ferroin] 0 the characteristic of the oscillations switches from ‘uncatalyzed’ to ‘catalyzed’-type. Additionally, the effects of the bromide ions and ferroin on the batch dynamics are investigated.