Many of the properties of ozone are very similar to those of peroxide of hydrogen. Thus ozone, like peroxide of hydrogen, is in many cases a powerful oxidising agent. In other cases, however, it acts as a deoxidiser. Thus ozone deoxidises peroxide of hydrogen and peroxide of barium with the production of water and oxide of barium. Peroxide of hydrogen also deoxidises oxide of silver, the peroxides of manganese and lead, permanganic and chromic acids, &c. Again, ozone is decomposed catalytically by dry silver leaf and by several oxides, such as the peroxides of manganese and lead, &c.