Hydrogen reaction with nitric oxide

Iron(lll) sulfate may be prepared by oxidation of iron(ll) sulfate by hydrogen peroxide, nitric acid or any other suitable oxidizing agent. The reaction is carried out in sulfuric acid. Balanced molecular equations for the reactions with hydrogen peroxide and nitric acid are as follows ... 

The direct reaction of superoxide with nitric oxide is only one of at least four possible pathways that can form peroxynitrite (Fig. 40). For example, superoxide should also efficiently reduce nitrosyldioxyl radical to peroxynitrite. Alternatively, nitric oxide may be reduced to nitroxyl anion, which reacts with oxygen to form peroxynitrite. Superoxide dismutase could even catalyze the formation of peroxynitrite, since reduced (Cu or cuprous) superoxide dismutase can reduce nitric oxide to nitroxyl anion (Murphy and Sies, 1991). Thus, superoxide might first reduce superoxide dismutase to the cuprous form, with nitric oxide reacting with reduced superoxide dismutase to produce nitroxyl anion. A fourth pathway to form peroxynitrite is by the rapid reaction of nitrosonium ion (NO" ) with hydrogen peroxide. This is a convenient synthetic route for experimental studies (Reed et al., 1974), but not likely to be physiologically relevant due to the low concentrations of hydrogen peroxide and the difficulty of oxidizing nitric oxide to nitrosonium ion. 

SAFETY PROFILE Moderately toxic by intraperitoneal and subcutaneous routes. A skin and severe eye irritant. Dangerous fire hazard when exposed to heat or flame can react with oxidizers. To fight fire, use alcohol foam, foam, CO2, dr) chemical. Potentially explosive reaction with hydrogen peroxide + nitric acid. When heated to decomposition it emits acrid smoke and fumes. See also KETONES. 

The main products of the gas-phase photolysis at 300 °K, with nitric oxide added, are hydrogen, propene, ethylene and pentenes. Other important products are ethane, butenes, methane, propane, butane and acetylene. A reaction scheme that accounts for most of the products of the nitric oxide-inhibited photolysis is as follows... 

Photoeffects with Ti02 in carbon monoxide, hydrogen, and water vapor have been sought 118, 128), but none have been found. Marked photo-reactions do occur, however, with nitric oxide and with the dye chlorazol sky blue 128, 129). 

DIPROPYL KETONE (123-19-3) CtH O Combustible liquid. Forms explosive mixture with air (flash point 118°F/48°C cc Fire Rating 2). Violent reaction with strong oxidizers, aldehydes, nitric acid, perchloric acid. Incompatible with strong bases, amines, amides, inorganic hydroxides hydrogen peroxide. A variety of unstable peroxides may be formed fi"om the reaction with hydrogen peroxide. On small fires, use dry chemical powder (such as Purple-K-Powder), foam, or CO2 extinguishers. 

---