The analysis of transport properties and resistance to oxidative degradation of different reverse osmosis membranes has been carried out to select the most adequate one for the ultrapurification of hydrogen peroxide. An optimization study has been completed to determine the best operation conditions for the membrane cascades and to assess the economic profit of the different ultrapurification processes. The research of conditions where each membrane could be competitive led to the design of a competitiveness map useful as a decision tool.