Peroxycarboxylic acids and inorganic peroxo acids are strong oxidants and extremely effective disinfectants. Some phagocytes kill the ingested pathogen with oxidants and nitric oxide. Animals are exposed to the same oxidants, and they have evolved endogenous enzymatic antioxidant systems. It typically reacts with oxidants of the reactive oxygen species, such as the hydroxyl radical. Hydrazine is hypergolic with oxidants like dinitrogen tetroxide or hydrogen peroxide, but not truly pyrophoric. Instead of using chemical oxidants, electrochemical oxidation is often possible. A variety of oxidants participate in this reaction including oxygen and hydrogen peroxide. Some related compounds find use as oxidants in organic synthesis. Mixing with chlorine-containing products or strong oxidants, such as household bleach, can generate chloramines. The tetroxide and its derivative potassium osmate are important oxidants in organic synthesis. Glutathione functions as a major frontline defense against the build-up of oxidants in the lung. These species oxidise to osmium(VIII) in the presence of such oxidants. These elements burn in the presence of air (O2) or oxidants (perchlorate, chlorate). It is structurally similar to perchloric acid, but lacks the hazards associated with oxidants. Persulfates are used as oxidants in organic chemistry.