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Properties of substance:
DL-lactic acid
Group of substances:
organic
Physical appearance:
colorless liquid
Empirical formula (Hill's system for organic substances):
C
3
H
6
O
3
Structural formula as text:
CH3CH(OH)COOH
Molar/atomic mass: 90.078
Melting point (°C):
18
Solubility (g/100 g of solvent):
diethyl ether
: sparingly soluble [
Ref.
]
ethanol
: very soluble [
Ref.
]
water
: 89 (0°C) [
Ref.
]
water
: 105 (10°C) [
Ref.
]
water
: 126 (20°C) [
Ref.
]
water
: 150 (30°C) [
Ref.
]
water
: 180 (40°C) [
Ref.
]
water
: 270 (60°C) [
Ref.
]
water
: 460 (80°C) [
Ref.
]
Hygroscopic:
yes
Numerical data:
Year of discovery: 1780
Density:
1.249 (15°C, g/cm
3
)
1.206 (25°C, g/cm
3
)
Reactions:
Yeild 65%. [
Ref.1
]
CH
3
CH(OH)COOH + CH
3
OH → CH
3
CH(OH)COOCH
3
+ H
2
O
Refractive index (n
D
):
1.4392 (20°C)
Vapour pressure (Torr):
15 (122°C)
Dissociation:
pK
a
(1) = 3.862 (25°C, water)
Permittivity (dielectric constant):
22 (17°C)
Heat of combustion (kJ/mol):
1364
References:
CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 3-336
Досон Р., Эллиот Д., Эллиот У., Джонс К. Справочник биохимика. - М.: Мир, 1991. - pp. 47 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 162 [Russian]
Свойства органических соединений: Справочник. - Под ред. Потехина А.А. - Л.: Химия, 1984. - pp. 312-313 [Russian]
Смирнов В.А. Пищевые кислоты. - М.: Легкая и пищевая промышленность, 1983. - pp. 27-29, 42-43 [Russian]
Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 798-799 [Russian]
Хёрд Ч.Д. Пиролиз соединений углерода. - Л.-М.: ГОНТИ РКТП СССР, 1938. - pp. 414-415 [Russian]
Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 130-131 [Russian]
Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 351 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru