|This article needs additional citations for verification. (January 2007)|
|Jmol-3D images||Image 1|
|Molar mass||63.0128 −1|
|Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)|
Peroxynitrous acid (HNO3) is a reactive nitrogen-containing species (RNS). It is the conjugate acid of peroxynitrite (ONOO−). It has a pKa of ~6.8. It is formed in vivo from the diffusion-controlled reaction of nitrogen monoxide (NO·) and superoxide (O2•–). It isomerises with k = 1.2 s−1, a process whereby up to 5% of hydroxyl and nitrogen dioxide radicals may be formed. It oxidises and nitrates aromatic compounds in low yield. The mechanism may involve a complex between the aromatic compound and ONOOH, and a transition from the cis- to the trans-configuration of ONOOH. Peroxynitrous acid is also important in atmospheric chemistry.
- N.Connelly and T. Damhus, IUPAC. Nomenclature of Inorganic Chemistry, RSC Publishing, Cambridge, 2005
- "Peroxynitrous Acid - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 16 September 2004. Identification and Related Records. Retrieved 11 April 2012.
- W. H. Koppenol, P. L. Bounds, T. Nauser, R. Kissner, H. Rüegger, Peroxynitrous acid: controversy and consensus surrounding an enigmatic oxidant, Dalton Trans., 2012, 41, 13779-13787.