1H-1,2,3-Triazole

• CAT Number: R053071
• CAS Number: 288-36-8
• Molecular Formula: C2H3N3
• Molecular Weight: 69.07
• Purity: ≥95%
• Synonyms: v-Triazole (7CI,8CI); 1,2,3-Triazole; 2,3-Diazapyrrole; 2H-1,2,3-Triazole; Osotriazole; Pyrrodiazole; Triazacyclopentadiene
• Storage: -20°C
• IUPAC Name: 2H-triazole
• InChI: InChI=1S/C2H3N3/c1-2-4-5-3-1/h1-2H,(H,3,4,5)
• InChIKey: QWENRTYMTSOGBR-UHFFFAOYSA-N
• SMILES: C1=NNN=C1

1H-1,2,3-Triazole (Cat No.: R053071) is a five-membered aromatic heterocycle composed of two carbon atoms and three nitrogen atoms in a 1,2,3 arrangement, with the molecular formula C₂H₃N₃. It exists in tautomeric forms, with the 1H-isomer being one of the most common. This compound is valued for its stability, hydrogen-bonding capacity, and electron-rich character. It serves as a key motif in medicinal chemistry, agrochemicals, and materials science. 1H-1,2,3-triazole is also a fundamental scaffold in “click chemistry” for bioconjugation and drug discovery applications.