Z 8625 (OTTO) Zirconium foil, 0.5 mm thick, 99.8% - used in the chemical industry where corrosive agents are used. Also, due to its excellent high temperature properties, coupled with its low neutron absorption,Z 8625 (OTTO) Zirconium foil, 0.5 mm thick, 99.8% used in the construction of nuclear reactors.