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Properties of substance:

benzimidazole



skc-file

Group of substances:

organic

Physical appearance:

rhombic crystals

Empirical formula (Hill's system for organic substances):

C7H6N2

Molar/atomic mass: 118.14

Melting point (°C):

170

Solubility (g/100 g of solvent):

benzene: insoluble [Ref.]
diethyl ether: difficulty soluble [Ref.]
ethanol: soluble [Ref.]
ligroin: insoluble [Ref.]
water: 0.33 (15°C) [Ref.]
water: 0.201 (20°C) [Ref.]

Dissociation:

pKBH+ (1) = 5.53 (25°C, water)
pKBH+ (2) = 12.3 (20°C, water)

LD50 (mg/kg):

3453 (rats, intraperitoneal)
2910 (mice, oral)
280 (mice, intravenous)

References:

  1. Wright J.B. The Chemistry of the Benzimidazoles / Chemical Reviews. - 1951. - Vol. 48, No. 3. - pp. 397-541
  2. Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 11ed. - Wiley-interscience, 2004. - pp. 372-373
  3. Гетероциклические соединения. - Т. 5, под ред. Эльдерфилда Р. - М.: ИИЛ, 1961. - pp. 211-214, 220 [Russian]
  4. Никифоров М.Н. Токсикология психо- и физикохимикатов. - Куйбышев, 1970. - pp. 39 [Russian]
  5. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 484-485 [Russian]
  6. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 70 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru