Propagating waves and pattern formation in a reaction-diffusion system with pyrogallol as substrate

The striking similarity between the nonlinear dynamical phenomena in chemical systems and those in biological systems, has enhanced the interest in the search of new reaction - diffusion systems. Here we report an oscillatory chemical system, which exhibits different types of chemical waves and patterns when kept unstirred The reaction constituents are 1,2,3-trihydroxybenzene (pyrogallol), ferroin, sulphuric acid and potassium bromate. The system has a significant advantage of being gas-free.