This disproportionation reaction is catalysed by methanogen archaea in their fermentative metabolism. DMSO is metabolized by disproportionation to dimethyl sulfide and dimethyl sulfone. Many polymer chemists are concerned with limiting the rate of disproportionation during polymerization. Chloric acid is thermodynamically unstable with respect to disproportionation. The second ranked application involves its disproportionation to a mixture of benzene and xylene. Several hypochlorites can be formed by a disproportionation reaction between chlorine and metal hydroxides. This reaction results in disproportionation, producing a mixture of alcohol and carboxylic acid. The termination steps of free radical polymerization steps are of two types&colon; "recombination" and "disproportionation". The latter also gives benzoic acid, an example of an organic disproportionation reaction . The hypochlorite ion is unstable with respect to disproportionation. Reaction inhibitors slow down a radical reaction and radical disproportionation is a competing reaction. Another method to generate mercuric cyanide is through the disproportionation of mercury(I) derivatives. In acidic aqueous solution the ion is unstable with respect to disproportionation. Another reaction that can sometimes occur instead of disproportionation is recombination. The disproportionation of hydrogen peroxide creates water and oxygen, as shown below.