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Properties of substance:
propionic acid
Group of substances:
organic
Physical appearance:
colorless liquid
Empirical formula (Hill's system for organic substances):
C
3
H
6
O
2
Structural formula as text:
CH3CH2COOH
Molar/atomic mass: 74.079
Melting point (°C):
-20.8
Boiling point (°C):
141.1
Solubility (g/100 g of solvent):
ammonia liquid
: soluble [
Ref.
]
chloroform
: miscible [
Ref.
]
diethyl ether
: miscible [
Ref.
]
ethanol
: miscible [
Ref.
]
hydrogen fluoride
: very soluble [
Ref.
]
water
: miscible [
Ref.
]
Density:
0.992 (20°C, g/cm
3
)
Reactions:
Yeild 80%. [
Ref.1
]
C
6
H
5
COCl + C
2
H
5
COOH → C
6
H
5
COOH + C
2
H
5
COCl
Refractive index (n
D
):
1.3874 (20°C)
Vapour pressure (Torr):
1 (4.6°C)
10 (39.7°C)
40 (65.8°C)
100 (85.1°C)
400 (122°C)
Dissociation:
pK
a
(1) = 4.874 (25°C, water)
pK
a
(1) = 7.02 (20°C, formamide)
Dipole moment (D):
1.75 (20°C)
Viscosity (mPa·s):
1.102 (20°C)
Surface tension (mN/m):
26.7 (20°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-510.7 (l)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
191 (l)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
152.8 (l)
Heat of combustion (kJ/mol):
1536.4
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-455.7 (g)
LD
50
(mg/kg):
1510 (white rats, oral)
1370 (white mice, oral)
Critical temperature (°C):
388.5
Critical pressure (MPa):
5.36
References:
CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-24
Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 186-193
Альберт А., Сержент Е. Константы ионизации кислот и оснований. - М.-Л.: Химия, 1964. - pp. 118 [Russian]
Березов Т.Т., Коровкин Б.Ф. Биологическая химия. - М.: Медицина, 1988. - pp. 377-378 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 176 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 389 [Russian]
Химическая энциклопедия. - Т. 4. - М.: Советская энциклопедия, 1995. - pp. 107-108 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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