Benzimidazole

Benzimidazole is a heterocyclic aromatic organic compound. This bicyclic compound may be viewed as fused rings of the aromatic compounds benzene and imidazole. It is a white solid that appears in form of tabular crystals.

Not to be confused with Benznidazole.
For medications and other benzimidazole derivatives classified as "benzimidazoles", see § Applications, below.
Benzimidazole
Names
Preferred IUPAC name
1H-1,3-Benzimidazole
Other names
1H-Benzo[d]imidazole
Identifiers
3D model (JSmol)
109682
ChEBI
ChEMBL
ChemSpider
DrugBank
ECHA InfoCard 100.000.075
EC Number
  • 200-081-4
3106
KEGG
PubChem CID
UNII
  • InChI=1S/C7H6N2/c1-2-4-7-6(3-1)8-5-9-7/h1-5H,(H,8,9) Y
    Key: HYZJCKYKOHLVJF-UHFFFAOYSA-N Y
  • InChI=1/C7H6N2/c1-2-4-7-6(3-1)8-5-9-7/h1-5H,(H,8,9)
    Key: HYZJCKYKOHLVJF-UHFFFAOYAX
SMILES
  • c1ccc2c(c1)[nH]cn2
Properties
C7H6N2
Molar mass 118.139 g·mol−1
Melting point 170 to 172 °C (338 to 342 °F; 443 to 445 K)
Acidity (pKa) 12.8 (for benzimidazole) and 5.6 (for the conjugate acid)
Hazards
GHS labelling:
Warning
H302, H315, H319, H335
P261, P264, P270, P271, P280, P301+P312, P302+P352, P304+P340, P305+P351+P338, P312, P321, P330, P332+P313, P337+P313, P362, P403+P233, P405, P501
Safety data sheet (SDS) External MSDS
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references
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