Synthetic porphyrin complexed with iron which acts as a peroxynitrite decomposition complex. Catalyzes the isomerization of peroxynitrite to nitrate under physiological conditions. Effectively prevents the oxidation of lipid components by peroxynitrite. Also catalytically decomposes superoxide radicals. Irridation of the aqueous solution at 335nm releases hydroxyl radicals. It can also serve as a potential drug for reactive oxygen species (ROS) detoxification.