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CAS No 51-17-2 , 1H-benzimidazole

  • Name: 1H-benzimidazole
  • Synonyms: Benziminazole;1H-Benzimidazole; Benzoimidazole; 3-Azaindole;1H-benzimidazole; 1,3-Benzodiazole; 51-17-2; o-Benzimidazole; Benzoglyoxaline;
  • CAS Registry Number:
  • Melting Point: 171-174 ºC
  • Flash Point: 208.4 ºC
  • Boiling Point: 360 ºC
  • Density: 1.242 g/cm3
  • Safety Statements: R36/37/38
  • Hazard Symbols: Xi: Irritant;
  • HS Code: 29339990
  • Flash Point: 208.4 ºC
  • EINECS: 200-081-4
  • Molecular Weight: 118.13594
  • InchiKey: HYZJCKYKOHLVJF-UHFFFAOYSA-N
  • InChI: InChI=1S/C7H6N2/c1-2-4-7-6(3-1)8-5-9-7/h1-5H,(H,8,9)
  • Risk Statements: S26;S37/39
  • Molecular Formula: C7H6N2
  • Molecular Structure:CAS No:51-17-2 1H-benzimidazole

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References of 1H-benzimidazole
Title: Benzimidazole
CAS Registry Number: 51-17-2
Synonyms: Benziminazole; 1,3-benzodiazole; azindole; benzoglyoxaline; N,N￠-methenyl-o-phenylenediamine
Molecular Formula: C7H6N2
Molecular Weight: 118.14
Percent Composition: C 71.17%, H 5.12%, N 23.71%
Literature References: Prepd by the reaction of o-phenylenediamine with formic acid: Wundt, Ber. 11, 826 (1878); Wagner, Millett, Org. Synth. coll. vol. II, 65 (1943). Reviews: J. B. Wright, Chem. Rev. 48, 397-541 (1951); K. Hofmann, Imidazole and Its Derivatives (Interscience, New York, 1953) p 247 sqq.
Properties: Tabular crystals. Orthorhombic and monoclinic modifications. mp 170.5°. bp760 >360°. Weak base. pKa = 5.48 at 25°. Absorption spectrum: Steck et al., J. Am. Chem. Soc. 70, 3406 (1948). Dipole moment: 3.93 (dioxane). Sparingly sol in cold water, more sol in hot water. Freely sol in alcohol, sparingly sol in ether. Practically insol in benzene, petr ether. One gram dissolves in 2 g of boiling xylene. Sol in aq solns of acids and strong alkalies. High degree of chemical stability.
Melting point: mp 170.5°
Boiling point: bp760 >360°
pKa: pKa = 5.48 at 25°