science-softCon uv/vis+ photochemistry database; www.photochemistry.org; (C) science-softCon 2019 Substance: nitrous acid Other Names: HNO2 Formula: HONO CAS-No.: 7782-77-6 Study: UV absorption cross sections Authors: A. Bongartz, J. Kames, F. Welter, U. Schurath Title: Near-uv absorption cross sections and trans/cis equilibrium of nitrous acid Journal/Source: J. Phys. Chem., 95, 1076-1082, (1991); DOI: 10.1021/j100156a012 Data: table, diagram Energy/Wavelength range: 300 - 400 nm Resolution: Temperature: 298 K Temperature dependence: no Pressure/Concentration: Phase: gas pH: Comments: The absorption spectrum of gaseous nitrous acid has been measured in the 300-400 nm range. Absolute cross sections were determined by a combination of gas-phase and wet chemical analysis. The integrated band area of the n-pi* transition yields an oscillator strength f = (8.90 ± 0.36) x 10^-4, less than the reported liquid phase value of 2 x 10^-3. The cross sections must be corrected by a factor of 0.855 (Bongartz et al., j. Atmos. Chem., 18, (1994), 149-169. Author to whom correspondence should be addressed: (e-mail address):