What is Benzimidazole?
{{chembox | Watchedfields = changed | verifiedrevid = 443415791 | ImageFile = Benzimidazole 2D numbered.svg | ImageSize = 160 | ImageAlt = Skeletal formula with numbering convention | ImageFileL1 = Benzimidazole-3D-balls.png | ImageSizeL1 = 140 | ImageAltL1 = Ball-and-stick model | ImageFileR1 = Benzimidazole-3D-spacefill.png | ImageAltR1 = Space-filling model | PIN = 1''H''-1,3-Benzimidazole | OtherNames = 1''H''-Benzo[''d'']imidazole |Section1={{Chembox Identifiers | KEGG_Ref = {{keggcite|correct|kegg}} | KEGG = C02009 | InChIKey = HYZJCKYKOHLVJF-UHFFFAOYAX | SMILES = c1ccc2c(c1)[nH]cn2 | StdInChI_Ref = {{stdinchicite|correct|chemspider}} | StdInChI = 1S/C7H6N2/c1-2-4-7-6(3-1)8-5-9-7/h1-5H,(H,8,9) | StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} | StdInChIKey = HYZJCKYKOHLVJF-UHFFFAOYSA-N | CASNo_Ref = {{cascite|correct|CAS}} | CASNo = 51-17-2 | PubChem = 5798 | ChEMBL_Ref = {{ebicite|correct|EBI}} | ChEMBL = 306226 | ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} | ChemSpiderID =5593 | UNII_Ref = {{fdacite|correct|FDA}} | UNII = E24GX49LD8 | ChEBI_Ref = {{ebicite|correct|EBI}} | ChEBI = 41275 | EINECS = 200-081-4 | DrugBank = DB02962 | Gmelin = 3106 | Beilstein = 109682 | InChI = 1/C7H6N2/c1-2-4-7-6(3-1)8-5-9-7/h1-5H,(H,8,9)}} |Section2={{Chembox Properties | C=7 | H=6 | N=2 | Appearance = | Density = | MeltingPtC = 170 to 172 | MeltingPt_notes = | BoilingPt = | Solubility = | pKa = 12.8 (for benzimidazole) and 5.6 (for the conjugate acid)<ref>{{cite journal|doi=10.1021/jo01066a039|title=Acidity Constants of Some Arylimidazoles and Their Cations |year=1961 |last1=Walba |first1=Harold |last2=Isensee |first2=Robert W. |journal=The Journal of Organic Chemistry |volume=26 |issue=8 |pages=2789–2791 }}</ref> }} |Section3={{Chembox Hazards | ExternalSDS = [http://msds.chem.ox.ac.uk/BE/benzimidazole.html External MSDS] | GHSPictograms = {{GHS07}} | GHSSignalWord = Warning | HPhrases = {{H-phrases|302|315|319|335}} | PPhrases = {{P-phrases|261|264|270|271|280|301+312|302+352|304+340|305+351+338|3