Hyponitrous acid

Hyponitrous acid
Names
	Preferred IUPAC name Diazenediol
	Systematic IUPAC name N-(Hydroxyimino)hydroxylamine
	Other names Hyponitrous acid dimer
Identifiers
CAS Number	14448-38-5;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:14428;
ChemSpider	55636;
Gmelin Reference	141300
KEGG	C01818;
PubChem CID	61744;
CompTox Dashboard (EPA)	DTXSID40896989 ;
	InChI InChI=1S/H2N2O/c3-1-2-4/h(H,1,4)(H,2,3) Key: NFMHSPWHNQRFNR-UHFFFAOYSA-N;
	SMILES ON=NO;
Properties
Chemical formula	H2N2O2
Molar mass	62.0282 g/mol
Appearance	white crystals
Conjugate base	Hyponitrite
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	explosive when dry
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Hyponitrous acid is a chemical compound with formula H
₂N
₂O
₂ or HON=NOH. It is an isomer of nitramide, H₂N−NO₂, and a formal dimer of azanone, HNO.

Hyponitrous acid forms two series of salts, the hyponitrites containing the [ON=NO]²⁻ anion and the "acid hyponitrites" containing the [HON=NO]⁻ anion.