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Properties of substance:
maleic acid
Group of substances:
organic
Physical appearance:
colorless monoclinic crystals
Empirical formula (Hill's system for organic substances):
C
4
H
4
O
4
Structural formula as text:
HOOCCH=CHCOOH
Molar/atomic mass: 116.07
Melting point (°C):
130.5
Decomposition temperature (°C):
200
Solubility (g/100 g of solvent):
1-propanol
: 25 (0°C) [
Ref.
]
1-propanol
: 32.1 (22.5°C) [
Ref.
]
acetic acid
: soluble [
Ref.
]
acetone
: 35.77 (29.7°C) [
Ref.
]
benzene
: 0.024 (25°C) [
Ref.
]
carbon tetrachloride
: 0.002 (25°C) [
Ref.
]
chloroform
: 0.011 (25°C) [
Ref.
]
diethyl ether
: 8.19 (25°C) [
Ref.
]
ethanol
: 43.3 (0°C) [
Ref.
]
ethanol
: 52.4 (22.5°C) [
Ref.
]
ethanol 95%
: 69.9 (20°C) [
Ref.
]
i-butanol
: 16.6 (0°C) [
Ref.
]
i-butanol
: 21.2 (22.5°C) [
Ref.
]
methanol
: 69.5 (22.5°C) [
Ref.
]
water
: 78.8 (25°C) [
Ref.
]
water
: 112.5 (40°C) [
Ref.
]
water
: 148.7 (60°C) [
Ref.
]
water
: 392.6 (97.5°C) [
Ref.
]
xylene: 0.0085 (29.7°C) [
Ref.
]
Density:
1.59 (20°C, g/cm
3
)
Dissociation:
pK
a
(1) = 1.92 (25°C, water)
pK
a
(1) = 6.23 (25°C, water)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-789.4 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
160.8 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
137 (s)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-679.4 (g)
LD
50
(mg/kg):
708 (rats, oral)
2400 (mice, oral)
References:
CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-25
Journal of Chemical Thermodynamics. - 1987. - Vol. 19. - pp. 317-320
Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 215-217
Stahl P.H., Wermuth C.G. Handbook of Pharmaceutical Salts: Properties, Selection, and Use. - Wiley-VCH, 2002. - pp. 292
Yalkowsky S.H., Yan H., Jain P. Handbook of aqueous solubility data. – 2nd ed. - CRC Press, 2010. - pp. 86
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 392 [Russian]
Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1160, 1272, 1312-1313 [Russian]
Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 762-763 [Russian]
Справочник химика. - Т. 3. - М.-Л.: Химия, 1965. - pp. 90 [Russian]
Химическая энциклопедия. - Т. 2. - М.: Советская энциклопедия, 1990. - pp. 640-641 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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