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 Authors: H. Johnston , R. Graham Title: Gas-phase ultraviolet absorption spectrum of nitric acid vapor Journal/Source: J. Phys. Chem., 77 (1), 62-63, (1973); DOI: 10.1021/j100620a013 Data: diagram, table Energy/Wavelength range: 190 - 325 nm Resolution: 0.7 nm Temperature: 298 K Temperature dependence: no Pressure/Concentration: Phase: vapor pH: Comments: The nitric acid spectrum is a continuum, consists of at least two different electronic states. The absorption cross section is above 10-17 cm2 at 190 nm, about 10-20 cm2 between 240-290 nm, and less than 10-22 cm2 from 322 to 370 nm. Author to whom correspondence should be addressed: (e-mail address):