Abstract : Storage of concentrated hydrogen peroxide in sealed containers over long periods of time requires a high degree of purification by removal of trace quantities of metallic contaminants and requires container surfaces of very low catalytic activity toward hydrogen peroxide. The method currently under study for final purification of peroxide is ion exchange over insoluble inorganic materials. Several promising materials are being used singly and in combination with each other in order to achieve the optimum improvement in stability. Various techniques for electroplating tin onto aluminum are being studied as a means of preparing non-catalytic surfaces for containers. Plastic liners of ACLAR fluorohalocarbon are being prepared also as non-catalytic surfaces for containers. Surface catalytic activity of other materials after various chemical pretreatments are being measured for application to other systems. (Author)