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Properties of substance:
glycolic acid
Group of substances:
organic
Physical appearance:
colorless rhombic crystals
Empirical formula (Hill's system for organic substances):
C
2
H
4
O
3
Structural formula as text:
HOCH2COOH
Molar/atomic mass: 76.05
Melting point (°C):
79-80
Solubility (g/100 g of solvent):
diethyl ether
: soluble [
Ref.
]
ethanol
: soluble [
Ref.
]
water
: 60.96 (24.99°C) [
Ref.
]
Reactions:
Yeild 80%. [
Ref.1
]
HOCH
2
COOH + CH
3
OH → HOCH
2
COOCH
3
+ H
2
O
Dissociation:
pK
a
(1) = 3.83 (25°C, water)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-583 (g)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-504.9 (g)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
318.6 (g)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
87.1 (g)
LD
50
(mg/kg):
1950 (rats, oral)
1920 (guinea pig, oral)
References:
CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-22
Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 117-118
Stahl P.H., Wermuth C.G. Handbook of Pharmaceutical Salts: Properties, Selection, and Use. - Wiley-VCH, 2002. - pp. 287
Yalkowsky S.H., Yan H. Handbook of aqueous solubility data. - CRC Press, 2003. - pp. 34
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 382 [Russian]
Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 618-619 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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