HO2NO2 , Hydrogen peroxide H2O2 , Formaldehyde HCHO

5 Other Oxides of Nitrogen (NO2, NO3, N2O5, HNO3, HO2NO2), Hydrogen peroxide (H2O2), Formaldehyde (HCHO) 

Other than NO and N2O, NO2, NO3, N2O5, HNO3, HO2NO2 are also important oxides of nitrogen in the stratosphere. Since their photolyses are also all important in the troposphere, their absorption spectra, cross sections, and photolytic processes have been described in the previous section including the stratospheric actinic flus region. H2O2 and CH4 also exist in the stratosphere in considerable concentration as they are formed by the mutual chain terminatimi reaction of HO2, and in the oxidation process of CH4, respectively, as in the troposphere. Their absorption spectra, cross sections, and photolytic processes have already been described in the previous section to be referred. 

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