BriggsRauscher
The Briggs–Rauscher reaction, often abbreviated BR reaction, is a non-equilibrium chemical oscillator notable for spontaneous, observable color changes in water-based solutions. It is a classic demonstration of nonlinear chemical kinetics and reaction-diffusion concepts in a simple, single-vessel system.
A typical BR mixture contains malonic acid, hydrogen peroxide, iodate (IO3−), and a strong acid such as
Visual behavior: In standard setups without starch, the solution cycles between colorless and an orange-brown color
Mechanism and significance: The BR reaction relies on interconnected autocatalytic redox processes under strongly acidic conditions.
History and naming: The reaction is named after Briggs and Rauscher, who described the oscillatory behavior