Amino radical

Amino radical
Names
	IUPAC name Azanyl; Aminyl
	Systematic IUPAC name Azanyl (substitutive); Dihydridonitrogen(•) (additive)
	Other names Amidogen; Amino radical
Identifiers
CAS Number	13770-40-6 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:29318 ;
ChemSpider	109932 ;
PubChem CID	123329;
CompTox Dashboard (EPA)	DTXSID801029786 ;
	InChI InChI=1S/H2N/h1H2 Key: MDFFNEOEWAXZRQ-UHFFFAOYSA-N ;
	SMILES [NH2];
Properties
Chemical formula	NH; 2•
Molar mass	16.0226 g mol−1
Thermochemistry
Std molar; entropy (S⦵298)	194.71 J K−1 mol−1
Std enthalpy of; formation (ΔfH⦵298)	190.37 kJ mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

In chemistry, the amino radical, ·NH₂, also known as the aminyl or azanyl, is the neutral form of the amide ion (NH−2). Aminyl radicals are highly reactive and consequently short-lived, like most radicals; however, they form an important part of nitrogen chemistry. In sufficiently high concentration, amino radicals dimerise to form hydrazine. While NH₂ as a functional group is common in nature, forming a part of many compounds (e.g. the phenethylamines), the radical cannot be isolated in its free form.