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| Preferred IUPAC name Hydroxy nitrate | |||
| Systematic IUPAC name Hydroxy nitrate | |||
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| Properties | |||
| Chemical formula | HNO4 | ||
| Molar mass | 79.01224 g/mol | ||
| Conjugate base | Peroxynitrate | ||
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| Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references | |||
Peroxynitric acid or peroxonitric acid is a chemical compound with the formula HNO
4. It is an oxyacid of nitrogen, after peroxynitrous acid.
Preparation
Peroxynitrate, the conjugate base of peroxynitric acid, is formed rapidly during decomposition of peroxynitrite in neutral conditions.
Atmospheric chemistry
Peroxynitric acid is formed in the atmosphere, although it is unstable, it is important as a reservoir for NO2 through the reversible radical reaction:
- HO
2NO
2 ⇌ HO
2 + NO
2
References
- "Peroxynitric Acid - Compound Summary".
- "peroxynitric acid". PubChem. Retrieved 9 December 2012.
- "125239-87-4". ChemIndex. Retrieved 9 December 2012.
- Miyamoto, S; Ronsein, GE; Corrêa, TC; Martinez, GR; Medeiros, MH; Di Mascio, P (2009). "Direct evidence of singlet molecular oxygen generation from peroxynitrate, a decomposition product of peroxynitrite". Dalton Trans (29): 5720–9. doi:10.1039/b905560f. PMID 20449086.
- Finlayson-Pitts, Barbara J.; Pitts, James N. (2000), Chemistry of the Upper and Lower Atmosphere, Elsevier, p. 100, doi:10.1016/b978-012257060-5/50000-9, ISBN 978-0-12-257060-5, retrieved 2020-09-24
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| Oxidation states | −3, −2, −1, 0, +1, +2, +3, +4, +5 (a strongly acidic oxide) |
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