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Properties of substance:
octadecanoic acid
Synonyms:
stearic acid
Group of substances:
organic
Physical appearance:
colorless monoclinic crystals
Empirical formula (Hill's system for organic substances):
C
1
8
H
3
6
O
2
Structural formula as text:
CH3(CH2)16COOH
Molar/atomic mass: 284.4772
Melting point (°C):
69.4-72
Boiling point (°C):
370
Decomposition temperature (°C):
370
Solubility (g/100 g of solvent):
1,1,2-trichloro-1,2,2-trifluoroethane
: soluble [
Ref.
]
1-butanol
: 1.6 (20°C) [
Ref.
]
2-propanol
: 2 (20°C) [
Ref.
]
acetic acid
: 0.12 (20°C) [
Ref.
]
acetone
: 4.96 (25°C) [
Ref.
]
amyl acetate
: 12.6 (25°C) [
Ref.
]
benzene
: 2.46 (20°C) [
Ref.
]
carbon disulphide
: 23.8 (25°C) [
Ref.
]
carbon tetrachloride
: 11.42 (25°C) [
Ref.
]
chloroform
: 18.4 (25°C) [
Ref.
]
cyclohexane
: 2.4 (20°C) [
Ref.
]
diethyl ether
: 25.06 (25°C) [
Ref.
]
dimethylsulfoxide
: 1.8 (25°C) [
Ref.
]
ethanol
: 3.16 (20°C) [
Ref.
]
ethanol
: 24.9 (40°C) [
Ref.
]
ethanol 95%
: 1.13 (20°C) [
Ref.
]
ethyl acetate
: 7.94 (25°C) [
Ref.
]
hexane
: 0.5 (20°C) [
Ref.
]
hexane
: 4.3 (30°C) [
Ref.
]
hexane
: 19 (40°C) [
Ref.
]
hexane
: 79.2 (50°C) [
Ref.
]
hexane
: 303 (60°C) [
Ref.
]
hydrogen fluoride
: very soluble [
Ref.
]
i-amyl alcohol
: 10.41 (25°C) [
Ref.
]
iron pentacarbonyl
: very slightly soluble [
Ref.
]
methanol
: 0.1 (20°C) [
Ref.
]
methyl formate
: 1.3 (25°C) [
Ref.
]
methylene chloride
: 3.58 (25°C) [
Ref.
]
methylene chloride
: 8.85 (30°C) [
Ref.
]
methylene chloride
: 18.3 (35°C) [
Ref.
]
nitrobenzene
: 1.26 (25°C) [
Ref.
]
toluene
: 15.75 (25°C) [
Ref.
]
water
: 0.00018 (0°C) [
Ref.
]
water
: 0.00029 (20°C) [
Ref.
]
water
: 0.00034 (30°C) [
Ref.
]
water
: 0.00042 (45°C) [
Ref.
]
water
: 0.0005 (60°C) [
Ref.
]
Density:
0.9408 (20°C, d
4
)
0.839 (80°C, d
4
)
Vapour pressure (Torr):
0.25 (159°C)
15 (232°C)
17 (238°C)
100 (291°C)
LD
50
(mg/kg):
21.5 (rats, intravenous)
23 (mice, intravenous)
References:
CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 3-462
Dictionary of organic compounds. - Vol. 3, naphthacarbazole - zygadenine. - М.: ИИЛ, 1949. - pp. 637
Jouyban A. Handbook of solubility data for pharmaceutacals. – CRC Press, 2010. - pp. 71
Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 787-789
Stahl P.H., Wermuth C.G. Handbook of Pharmaceutical Salts: Properties, Selection, and Use. - Wiley-VCH, 2002. - pp. 305
Маркман А.Л. Химия липидов. - Вып. 1: Жирные кислоты. - Ташкент: Издательство АН Узбекской ССР, 1963. - pp. 16 [Russian]
Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1194, 1583 [Russian]
Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 952-953 [Russian]
Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 541 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru