1-Hydroxy-7-azabenzotriazole

"HOAt" redirects here. For hybrid organic acid technology, see antifreeze.

1-Hydroxy-7-azabenzotriazole

Names
Systematic IUPAC name 3-Hydroxytriazolo[4,5-b]pyridine
Identifiers
CAS Number	39968-33-7 N
ChemSpider	158005 Y
Jmol 3D model	Interactive image
PubChem	181649
InChI InChI=1S/C5H4N4O/c10-9-5-4(7-8-9)2-1-3-6-5/h1-3,10H Y Key: FPIRBHDGWMWJEP-UHFFFAOYSA-N Y InChI=1/C5H4N4O/c10-9-5-4(7-8-9)2-1-3-6-5/h1-3,10H Key: FPIRBHDGWMWJEP-UHFFFAOYAJ
SMILES n1cccc2nnn(O)c12
Properties
Chemical formula	C5H4N4O
Molar mass	136.11 g·mol−1
Vapor pressure	{{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YN ?)
Infobox references

1-Hydroxy-7-azabenzotriazole, commonly abbreviated HOAt, is a triazole used as a peptide coupling reagent. It suppresses the loss of chirality.