Peroxynitric acid

Peroxynitric acid
Names
	Preferred IUPAC name Hydroxy nitrate
	Systematic IUPAC name Hydroxy nitrate
Identifiers
CAS Number	26404-66-0 ;
3D model (JSmol)	Interactive image;
ChemSpider	58833 ;
PubChem CID	65357;
CompTox Dashboard (EPA)	DTXSID201030501 ;
	InChI Key: UUZZMWZGAZGXSF-UHFFFAOYSA-N [Pubchem];
	SMILES [N+](=O)([O-])OO;
Properties
Chemical formula	HNO4
Molar mass	79.01224 g/mol
Conjugate base	Peroxynitrate
Related compounds
Related compounds	Peroxynitrous acid; Peroxynitrate;
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 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.^[4]

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:^[5]

HO
₂NO
₂ ⇌ HO^•
₂ + NO^•
₂

References

[1]

[2]

[3]

[4]

[5]