Ultraviolet absorption spectrum of hydrogen peroxide vapor

The ultraviolet absorption cross sections of hydrogen peroxide vapor have been determined over the wavelength range 210 to 350 nm at 296°K. At the longer wavelengths, the gas phase absorptivities are significantly larger than the corresponding values in condensed phase. The atmospheric H 2 O 2 photodissociation rate for overhead sun at the earth's surface is estimated to be about 1.3 × 10 −5 sec −1 .