BZ Oscilating reaction

The Belousov-Zhabotinsky (BZ) reaction is a family of oscillating chemical reactions. During these reactions, transition-metal ions catalyze oxidation of various, usually organic, reductants by bromic acid in acidic water solution. Most BZ reactions are homogeneous. The BZ reaction makes it possible to observe development of complex patterns and can generate up to several thousand oscillatory cycles in a closed system.

The reaction was discovered by Boris Pavlovitch Belousov around 1950 while he was trying to model the Krebs cycle using a metallic catalyst instead of proteins. He noticed that a solution of aqueous malonic acid with acidi ed bromate with a catalyst would oscillate between clear and colored for up to an hour.