Chlorite-Iodide-Malonic Acid (CIMA) Reaction

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The Demonstration presents the chlorite-iodide-malonic acid (CIMA) reaction, which gives rise to temporal oscillations.


The reaction scheme is:


where and .

The dimensionless governing equations are:



Oscillating patterns are observed for . In fact, oscillations are obtained in snapshot 1 for and . The phase-plane diagram shows a limit cycle.

On the other hand, a stable steady state is found for and (snapshot 3). Phase-plane analysis shows a stable node. The locations of the selected parameter values are plotted in the stability diagram that demarcates the parameter space between limit cycles (periodic oscillations) and damped oscillations.


Contributed by: Housam Binous, Brian G. Higgins, and Ahmed Bellagi (January 2013)
Open content licensed under CC BY-NC-SA




[1] I. R. Epstein and J. A. Pojman, An Introduction to Nonlinear Chemical Dynamics: Oscillations, Waves, Patterns, and Chaos, New York: Oxford University Press, 1998.

[2] G. Nicolis, Dynamique chimique: thermodynamique, cinétique et mécanique statistique, Paris: Dunod, 2005.

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