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Properties of substance:
imidazole
skc-file
Synonyms:
glyoxaline
Group of substances:
organic
Physical appearance:
colorless prismatic crystals
Empirical formula (Hill's system for organic substances):
C
3
H
4
N
2
Molar/atomic mass: 68.07
Melting point (°C):
90
Boiling point (°C):
256
CAS №: 288-32-4
Solubility (g/100 g of solvent):
acetone
: soluble [
Ref.
]
benzene
: sparingly soluble [
Ref.
]
chloroform
: soluble [
Ref.
]
diethyl ether
: soluble [
Ref.
]
ethanol
: very soluble [
Ref.
]
petroleum ether: sparingly soluble [
Ref.
]
pyridine
: soluble [
Ref.
]
water
: 206 (19°C) [
Ref.
]
Density:
1.0303 (101°C, g/cm
3
)
Refractive index (n
D
):
1.4801 (101°C)
Vapour pressure (Torr):
12 (138.2°C)
Dissociation:
pK
BH
+
(1) = 7.1 (25°C, water)
pK
a
(1) = 14.2 (25°C, water)
Dipole moment (D):
6.21 (20°C)
3.98
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
49.8 (s)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
132.9 (g)
LD
50
(mg/kg):
220 (rats, oral)
626 (rats, subcutaneous)
880 (mice, oral)
300 (mice, intraperitoneal)
References:
CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-23
CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 8-106
Stahl P.H., Wermuth C.G. Handbook of Pharmaceutical Salts: Properties, Selection, and Use. - Wiley-VCH, 2002. - pp. 318-319
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 150 [Russian]
Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 698-699 [Russian]
Химическая энциклопедия. - Т. 2. - М.: Советская энциклопедия, 1990. - pp. 210 [Russian]
Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 217 [Russian]
Химия: справочное руководство. - Под ред. Гаврюченкова Ф.Г., Курочкиной М.И. и др. - Л.: Химия, 1975. - pp. 368-370 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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