We plan to study the non-thermal microwave (MW) effects on H2O2 through its reaction with muonium under MW irradiation. The key objectives are 1) for the first time definitively measure the formation of free radicals of hydrogen preoxide under MW irradiation by non-thermal effects 2) measure for the first time rate constants of the reaction of hydrogen peroxide in methanol by thermal and MW methods 3) open up new investigations of free radical reactions in-situ by MW irradiation. 4) Demonstrate a new custom built instrument capable of high powered microwave irradiation of samples investigated by µSR.