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Properties of substance:
caffeine
skc-file
Group of substances:
organic
Physical appearance:
colorless needles crystals
Empirical formula (Hill's system for organic substances):
C
8
H
1
0
N
4
O
2
Molar/atomic mass: 194.2
Melting point (°C):
235-237
Boiling point (°C):
384
Sublimation point (°C):
180
Decomposition temperature (°C):
384
CAS №: 58-08-2
Solubility (g/100 g of solvent):
acetone
: 2.32 (30.5°C) [
Ref.
]
aniline
: 29.4 (30.5°C) [
Ref.
]
benzaldehyde
: 13.1 (30.5°C) [
Ref.
]
benzene
: 0.9 (18°C) [
Ref.
]
benzene
: 1.16 (25°C) [
Ref.
]
benzene
: 1.23 (30.5°C) [
Ref.
]
benzene
: 5.29 (80.1°C) [
Ref.
]
carbon disulphide
: 0.06 (17°C) [
Ref.
]
carbon tetrachloride
: 0.09 (18°C) [
Ref.
]
carbon tetrachloride
: 0.26 (20°C) [
Ref.
]
carbon tetrachloride
: 0.7 (76.8°C) [
Ref.
]
chloroform
: 14.2 (20°C) [
Ref.
]
chloroform
: 15.62 (61.2°C) [
Ref.
]
diethyl ether
: 0.12 (18°C) [
Ref.
]
diethyl ether
: 0.27 (25°C) [
Ref.
]
diethyl ether
: 0.3 (34.6°C) [
Ref.
]
ethanol
: 1.87 (25°C) [
Ref.
]
ethanol
: 5.85 (60°C) [
Ref.
]
ethyl acetate
: 1.14 (20°C) [
Ref.
]
methanol
: 1.14 (25°C) [
Ref.
]
p-cymene
: 0.76 (25°C) [
Ref.
]
petroleum ether: sparingly soluble [
Ref.
]
pyridine
: 34.39 (room temperature) [
Ref.
]
toluene
: 0.58 (25°C) [
Ref.
]
trichloroethylene
: 0.75 (15°C) [
Ref.
]
water
: 0.7548 (0°C) [
Ref.
]
water
: 1.35 (16°C) [
Ref.
]
water
: 2.1 (25°C) [
Ref.
]
water
: 2.583 (30°C) [
Ref.
]
water
: 4.4 (40°C) [
Ref.
]
water
: 27.33 (85°C) [
Ref.
]
water
: 45.5 (90°C) [
Ref.
]
water
: 50 (100°C) [
Ref.
]
Numerical data:
Year of discovery: 1819
R
f
: 0.14
R
f
: 0.71
R
f
: 0.8
Bitter taste threshold concentrations (mM): 0.5
Density:
1.23 (19°C, g/cm
3
)
Dissociation:
pK
BH
+
(1) = 0.6 (25°C, water)
LD
50
(mg/kg):
192 (rats, oral)
105 (rats, intravenous)
127 (mice, oral)
62 (mice, intravenous)
140 (dogs, oral)
References:
Dean J.A. Lange's handbook of chemistry. - 1999. - pp. 1.136
Kleemann A. Pharmaceutical Substances. - 2000. - pp. 316
Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 610-614
Yalkowsky S.H., Yan H. Handbook of aqueous solubility data. - CRC Press, 2003. - pp. 499-500
Беликов В.Г. Учебное пособие по фармацевтической химии. - М.: Медицина, 1979. - pp. 398 [Russian]
Глущенко Н.Н., Плетенева Т.В., Попков В.А. Фармацевтическая химия. - М.: Academa, 2004. - pp. 321, 325 [Russian]
Государственная фармакопея СССР. - 10-е изд. - М.: Медицина, 1968. - pp. 198-199 [Russian]
Закусов В.В. Фармакология. - М.: Медгиз, 1960. - pp. 126-130 [Russian]
Кацнельсон М.М. Приготовление синтетических химико-фармацевтических препаратов. - М., 1923. - pp. 277-279 [Russian]
Майофис Л.С. Технология химико-фармацевтических препаратов. - Л.: Медгиз, 1958. - pp. 462-470 [Russian]
Максютина Н.П., Каган Ф.Е. и др. Методы идентификации фармацевтических препаратов. - Киев: Здоров'я, 1978. - pp. 166 [Russian]
Мелентьева Г.А., Антонова Л.А. Фармацевтическая химия. - М.: Медицина, 1993. - pp. 440-441 [Russian]
Неотложная помощь при острых отравлениях: Справочник по токсикологии. - Под ред. Голикова С.Н. - М.: Медицина, 1977. - pp. 146 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 153 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 502 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 502 [Russian]
Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1520-1521 [Russian]
Столяров Г.В. Лекарственные психозы и психотомиметические средства. - М.: Медицина, 1964. - pp. 133-151 [Russian]
Халецкий А.М. Фармацевтическая химия. - Л.: Медицина, 1966. - pp. 514-515 [Russian]
Химическая энциклопедия. - Т. 2. - М.: Советская энциклопедия, 1990. - pp. 487-488 [Russian]
Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 280 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru