Potassium superoxide, commercial availability

Potassium ozonide, 735 Potassium permanganate chemiluminescence, 643 hydrogen peroxide titration, 627 ozonide redox titration, 736 Potassium peroxymonosulfate, dioxirane preparation, 26, 1020-30, 1130 Potassium superoxide, commercial availability, 620... 

Commercially available potassium superoxide and tetramethylammonium hydroxide pentahydrate from Aldrich were used as supplied without further purification. Industrial-grade nitrogen gas does not require any further purification, but the ammonia gas, 99.999%, should be at a minimum purged through Drierite before use. AU work is done under a nitrogen flow unless otherwise stated. 

Potassium superoxide KO2 is commercially available. But since dioxygen is reversibly reduced in aprotic organic solvents at many types of electrodes (e.g. platinum, glassy carbon), it can be easily formed in situ [144], The superoxide can be readily protonated therefore aprotic solvents possessing an efficient proton donor and aqueous solvents permit a two-electron step to occur. This step affords the formation of hydrogen peroxide. Its further reduction... 

The most important application of crown ether is in superoxide chemistry. In fact the use of superoxide (KjO and Na02) has been limited due to the solubility problem. Use of crown ether along with a superoxide for the oxidative dimerisation is a typical application. A cheap potassium superoxide (KO2) is available from commercial source and is a source for the generation of superoxide radical anion readily available for the reaction (Scheme-38). ... 

Annually, oxygen is one of the principal chemicals manufactured in the United States. The uses of oxygen gas are summarized in Table 22.10. With its commercial availability, O2 is not commonly prepared in the laboratory. In a submarine, in spacecraft, and in an emergency breathing apparatus, however, it is necessary to generate small quantities of oxygen from solids. The reaction of potassium superoxide with CO2 works well for this purpose because, as the reaction below shows, KO2 removes CO2 while O2 is being formed ... 

Although O2" is a stable anion radical, easily generated or even available commercially as the potassium salt, its chemical behavior has received significant attention only within the last several years. Chemical interest was spawned by the discovery of Fridovich and coworkers (] ) that superoxide dismutase, an enzyme present in all aerobic organisms studied, has as its function the dismutation of O2 into H2O2 and O2 (equation 1). Since... 

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