1,2,4-Triazole

1,2,4-Triazole (as ligand in coordination compounds, Htrz abbreviation is sometimes used) is one of a pair of isomeric chemical compounds with molecular formula C2H3N3, called triazoles, which have a five-membered ring of two carbon atoms and three nitrogen atoms. 1,2,4-Triazole and its derivatives find use in a wide variety of applications.

1,2,4-Triazole
Names
Preferred IUPAC name
1H-1,2,4-Triazole
Other names
1,2,4-Triazole pyrrodiazole
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.005.476
PubChem CID
UNII
  • InChI=1S/C2H3N3/c1-3-2-5-4-1/h1-2H,(H,3,4,5) Y
    Key: NSPMIYGKQJPBQR-UHFFFAOYSA-N Y
  • InChI=1/C2H3N3/c1-3-2-5-4-1/h1-2H,(H,3,4,5)
    Key: NSPMIYGKQJPBQR-UHFFFAOYAZ
SMILES
  • N1C=NC=N1
Properties
C2H3N3
Molar mass 69.00725
Appearance white solid
Density 1.439 g/cm3
Melting point 120 to 121 °C (248 to 250 °F; 393 to 394 K)
Boiling point 260 °C (500 °F; 533 K)
very soluble
Acidity (pKa) 10,3
Basicity (pKb) 11,8
Hazards
Flash point 140 °C (284 °F; 413 K)
Related compounds
Related compounds
 1,2,3-triazole imidazole
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
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