3D model (JSmol)
  • InChI=1S/HNO4/c2-1(3)5-4/h4H/p-1
  • [N+](=O)([O-])O[O-]
Molar mass 78.004 g·mol−1
Related compounds
Related compounds
peroxycarbonate; peroxysulfate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Peroxynitrate (or peroxonitrate) refers to salts of the unstable peroxynitric acid, HNO4. Peroxynitrate is unstable and decomposes to nitrate and dioxygen.[1]

No solid peroxynitrate salts are known.[2] However, there is a report that the Russian chemist Sebastian Moiseevich Tanatar produced sodium peroxynitrate octahydrate (NaNO3·H2O2·8H2O) by evaporating a solution of sodium nitrate and hydrogen peroxide until crystallisation begins and then mixing with alcohol to form crystals of the octahydrate.[3]


  1. ^ Miyamoto, Sayuri; Ronsein, Graziella E.; Corrêa, Thaís C.; Martinez, Glaucia R.; Medeiros, Marisa H. G.; Di Mascio, Paolo (2009). "Direct evidence of singlet molecular oxygen generation from peroxynitrate, a decomposition product of peroxynitrite". Dalton Transactions (29): 5720. doi:10.1039/b905560f. ISSN 1477-9226.
  2. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
  3. ^ Mellor, Joseph William (1922). A Comprehensive Treatise on Inorganic and Theoretical Chemistry, Volume 2. New York: Longmans, Green and Co. p. 816.