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Properties of substance:
bromine
Group of substances:
inorganic
Physical appearance:
liquid
Empirical formula (Hill's system for organic substances):
Br
2
Structural formula as text:
Br2
CAS No: 7726-95-6
Molar/atomic mass: 159.81
Melting point (°C):
-7.25
Boiling point (°C):
58.8
Solubility (g/100 g of solvent):
acetone
: reaction [
Ref.
]
carbon disulphide
: miscible [
Ref.
]
carbon disulphide
: 83.15 (-95°C) [
Ref.
]
carbon tetrachloride
: soluble [
Ref.
]
chloroform
: very soluble [
Ref.
]
diethyl ether
: very soluble [
Ref.
]
ethanol
: very soluble [
Ref.
]
hydrogen chloride liquid anhydrous
: very soluble [
Ref.
]
hydrogen fluoride
: sparingly soluble [
Ref.
]
kerosene: soluble [
Ref.
]
phosphoric acid 85%
: sparingly soluble [
Ref.
]
sulfur dioxide
: miscible [
Ref.
]
sulfur monochloride
: soluble [
Ref.
]
sulfuric acid 95%
: 0.75 (25°C) [
Ref.
]
water
: 4.3 (-0.58°C) [
Ref.
]
water
: 3.58 (20°C) [
Ref.
]
water
: 3.43 (30°C) [
Ref.
]
water
: 3.58 (54°C) [
Ref.
]
water
: 0.14 (100°C) [
Ref.
]
Numerical data:
Year of discovery: 1826
Triple point temperature (°C): -7.3
Triple point pressure (torr): 46
Density:
3.4 (-7.3°C, d
4
)
3.1883 (0°C, d
4
)
3.1193 (20°C, g/cm
3
)
3.102 (25°C, g/cm
3
)
3.0848 (30°C, g/cm
3
)
3.0494 (40°C, d
4
)
Refractive index (n
D
):
1.6475 (25°C)
Vapour pressure (Torr):
0.13 (-80°C)
0.79 (-60°C)
1.09 (-50°C)
3.4 (-40°C)
7.45 (-30°C)
10 (-26°C)
16.5 (-20°C)
44.4 (-7.3°C)
65.9 (0°C)
100 (8.6°C)
173 (20°C)
264 (30°C)
392 (40°C)
564 (50°C)
Electrode potential:
Br
2
(ж.) + 2e
-
→ 2Br
-
, E = 1.065 V (water, 25°C)
Permittivity (dielectric constant):
3.22 (15°C)
Viscosity (mPa·s):
1.253 (0°C)
0.942 (25°C)
0.746 (50°C)
Surface tension (mN/m):
44.1 (13°C)
41.5 (20°C)
Speed sound (m/s):
135 (0°C, aggregative state - gas)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
0 (l)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
0 (l)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
152.2 (l)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
75.69 (l)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
9.44
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
29.5
LD
50
(mg/kg):
5500 (guinea pig, oral)
3100 (mice, oral)
Critical temperature (°C):
311
Critical pressure (MPa):
10.3
Critical density (g/cm
3
):
1.18
References:
Angewandte Chemie International Edition. - 1966. - Vol. 5, No. 3. - pp. 280-287
Bretherick's Handbook of Reactive Chemical Hazards. - 6 ed., Vol. 1. - Butterworth-Heinemann, 1999. - pp. 103-109
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 206-214
Агрономов А.Е., Шабаров Ю.С. Лабораторные работы в органическом практикуме. - М., 1974. - pp. 276-277 [Russian]
Вредные химические вещества: Неорганические соединения элементов V-VIII групп. Справочник. - Л., 1989. - pp. 389-390 [Russian]
Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 50, 229 [Russian]
Карякин Ю.В., Ангелов И.И. Чистые химические вещества. - М., 1974. - pp. 75-76 [Russian]
Позин М.Е. Технология минеральных солей (удобрений, пестицидов, промышленных солей, окислов и кислот). - Ч.1. - Л.: Химия, 1974. - pp. 206-231 [Russian]
Полянский Н.Г. Аналитическая химия брома. - М.: Наука, 1980. - pp. 13-19 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 57 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 621-623 [Russian]
Физические величины. - Под ред. Григорьева И.С., Мейлихова Е.З. - М.: Энергоатомиздат, 1991. - pp. 134 [Russian]
Химическая технология неорганических веществ. - Кн.2, под ред. Ахметова Т.Г. - М.: Высшая школа, 2002. - pp. 306-331 [Russian]
Химическая энциклопедия. - Т. 1. - М.: Советская энциклопедия, 1988. - pp. 318 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru