science-softCon uv/vis+ photochemistry database;	www.photochemistry.org; (C) science-softCon 2019

Substance: nitrous acid					Other Names: nitrosyl hydroxide

Formula: HNO2						CAS-No.: 7782-77-6	PubChem: CID 24529

Study: UV absorption cross sections, photolysis, quantum yields

                
Authors: R.A. Cox, R.G. Derwent

Title: The ultraviolet absorption spectrum of gaseous nitrous acid

Journal/Source: J. Photochem., 6, 23-24, (1976-1977); http://dx.doi.org/10.1016/0047-2670(76)87004-9


Data: table, diagram

Energy/Wavelength range: 200 - 394 nm

Resolution: 

Temperature: 295 K

Temperature dependence: no

Pressure/Concentration: 

Phase: gas

pH:


Comments: The ultra-violet absorption spectrum of gaseous nitrous acid was quantitatively examined over the wavelength 
range 200-400 nm. In addition to the diffuse bands between 310 and 380 nm previously reported in the literature, an intense, 
broad absorption maximum was found at 215 nm. The quantum yield of OH radical production from the photolysis of nitrous 
acid at 365 ± 5 nm was found to be (0.92 ± 0.16). 

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