science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2019 Substance: nitric acid Other Names: hydrogen nitrate Formula: HNO3 CAS-No.: 7697-37-2 PubChem: CID 944 Study: uv absorption cross sections, photodissociation Authors: F. Biaume Title: Nitric acid vapor absorption cross section spectrum and its photodissociation in the stratosphere Journal/Source: J. Photochem., 2, 139-149, (1973-1974); doi:10.1016/0047-2670(73)80012-7 Data: diagram, table Energy/Wavelength range: 185 - 325 nm Resolution: 1.8 - 5.0 nm Temperature: 298 K Temperature dependence: no Pressure/Concentration: Phase: vapor pH: Comments: Absorption cross-section values of nitric acid vapour at room temperature have been measured at different wavelengths in the 1850 - 3250 Å spectral range. Estimates, assuming a quantum yield equal to unity, are also given for the nitric acid photodissociation coefficient in the stratosphere. Author to whom correspondence should be addressed: (e-mail address):