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Properties of substance:
magnesium sulfate
Synonyms:
magnesium sulphate
Group of substances:
inorganic
Physical appearance:
colorless rhombic crystals
Empirical formula (Hill's system for organic substances):
MgO
4
S
Structural formula as text:
MgSO4
Molar/atomic mass: 120.36
Melting point (°C):
1127
Decomposition temperature (°C):
1127
Solubility (g/100 g of solvent):
acetic acid
: practically insoluble [
Ref.
]
acetone
: insoluble [
Ref.
]
ammonia liquid
: insoluble [
Ref.
]
carbon disulphide
: insoluble [
Ref.
]
diethyl ether
: 1.16 (18°C) [
Ref.
]
ethanol
: 0.025 (15°C) [
Ref.
]
ethanol
: 0.02 (35°C) [
Ref.
]
ethanol
: 0.016 (55°C) [
Ref.
]
ethyl acetate
: insoluble [
Ref.
]
formic acid 95%
: 0.34 (19°C) [
Ref.
]
glycerol
: 26.3 (25°C) [
Ref.
]
hydrazine
: insoluble [
Ref.
]
methanol
: 0.276 (15°C) [
Ref.
]
methanol
: 0.224 (25°C) [
Ref.
]
methanol
: 0.18 (35°C) [
Ref.
]
methanol
: 0.153 (45°C) [
Ref.
]
methanol
: 0.123 (55°C) [
Ref.
]
methyl acetate
: insoluble [
Ref.
]
sulfuric acid
: 0.22 (25.7°C) [
Ref.
]
sulfuric acid
: 1.71 (91.7°C) [
Ref.
]
water
: 25.5 (0°C) [
Ref.
]
water
: 30.4 (10°C) [
Ref.
]
water
: 35.1 (20°C) [
Ref.
]
water
: 37.4 (25°C) [
Ref.
]
water
: 39.7 (30°C) [
Ref.
]
water
: 44.7 (40°C) [
Ref.
]
water
: 50.4 (50°C) [
Ref.
]
water
: 54.8 (60°C) [
Ref.
]
water
: 59.2 (70°C) [
Ref.
]
water
: 54.8 (80°C) [
Ref.
]
water
: 50.2 (100°C) [
Ref.
]
water
: 24.1 (150°C) [
Ref.
]
water
: 1.5 (200°C) [
Ref.
]
Multicomponent solubility (in wt%):
water 59.27%, IPA 39.3%, magnesium sulfate 1.43%, 25 °C [
Ref.
]
water 76.1%, IPA 12.1%, magnesium sulfate 11.8%, 25 °C [
Ref.
]
water 74.5%, IPA 3.%, magnesium sulfate 22.5%, 25 °C [
Ref.
]
water 23.03%, sulfuric acid 74.01%, magnesium sulfate 2.96%, 30 °C, separating phase: MgSO4 * 6H2O [
Ref.
]
water 35.87%, sulfuric acid 56.21%, magnesium sulfate 7.92%, 30 °C, separating phase: MgSO4 * 6H2O [
Ref.
]
water 1.3%, sulfuric acid 98.56%, magnesium sulfate 0.14%, 12,5 °C, separating phase: MgSO4 * 3H2O [
Ref.
]
Properties of solutions:
10% (wt.), solvent - water
Dynamic viscosity (mPa·s) = 1.829 (20°)
Density (g/cm
3
) = 1.1034 (20°)
Index of refraction = 1.3532 (20°)
Freezing point (°C) = -1.85
Hygroscopic:
yes
Numerical data:
Critical relative humidity (%): 90.2
Bitter taste threshold concentrations (mM): 0.385
Density:
2.66 (20°C, g/cm
3
)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-1301.4 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-1158.7 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
91.6 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
96.48 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
14.6
LD
50
(mg/kg):
150 (mice, intraperitoneal)
References:
Comey A. M., Hahn D. A. A dictionary of Chemical Solubilities Inorganic. - 2 ed. - New York, The MacMillan Company, 1921. - pp. 984-988
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 985-995
Вредные химические вещества: Неорганические соединения элементов I-IV групп. Справочник. - Л.: Химия, 1988. - pp. 104 [Russian]
Позин М.Е. Технология минеральных солей (удобрений, пестицидов, промышленных солей, окислов и кислот). - Ч.1. - Л.: Химия, 1974. - pp. 301-304 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 78 [Russian]
Рипан Р., Четяну И. Неорганическая химия. - Т.1. - М.: Мир, 1971. - pp. 182 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 237, 775-776 [Russian]
Химическая энциклопедия. - Т. 2. - М.: Советская энциклопедия, 1990. - pp. 629-630 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru