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Properties of substance:
arsenic gray
Group of substances:
inorganic
Physical appearance:
hexagonal metal
Empirical formula (Hill's system for organic substances):
As
Structural formula as text:
As
Molar/atomic mass: 74.92
Sublimation point (°C):
615
Solubility (g/100 g of solvent):
ammonia liquid
: insoluble [
Ref.
]
diethyl ether
: insoluble [
Ref.
]
ethanol
: insoluble [
Ref.
]
mercury
: 0.0000001 (20°C) [
Ref.
]
methylene iodide
: insoluble [
Ref.
]
water
: insoluble [
Ref.
]
Numerical data:
Hardness on the Mohs’ scale: 3.5
Density:
5.72 (20°C, g/cm
3
)
5.24 (817°C, g/cm
3
)
Reactions:
[
Ref.1
]
3K + As → K
3
As
Half-life:
64
33
As = 40 ms (β
+
(100%))
65
33
As = 170 ms (β
+
(100%))
66
33
As = 95.77 ms (β
+
(100%))
66m
33
As = 1.14 μs (internal transition (100%))
66n
33
As = 7.98 μs (internal transition (100%))
67
33
As = 42.5 s (β
+
(100%))
68
33
As = 151.6 s (β
+
(100%))
68m
33
As = 111 ns (internal transition (100%))
69
33
As = 15.2 min (β
+
(100%))
70
33
As = 52.6 min (β
+
(100%))
70m
33
As = 96 μs (internal transition (100%))
71
33
As = 65.30 h (β
+
(100%))
72
33
As = 26.0 h (β
+
(100%))
73
33
As = 80.30 d (electron capture (100%))
73m
33
As = 5.7 μs (internal transition (100%))
74
33
As = 17.77 d (β
+
(66%), β
-
(34%))
75
33
As = stable ( (isotopic abundance 100%))
75m
33
As = 17.62 ms (internal transition (100%))
76
33
As = 1.0778 d (β
+
(about 100%), electron capture (< 0.02%))
76m
33
As = 1.84 μs (internal transition (100%))
77
33
As = 38.79 h (β
-
(100%))
77m
33
As = 114.0 μs (internal transition (100%))
78
33
As = 90.7 min (β
-
(100%))
79
33
As = 9.01 min (β
-
(100%))
79m
33
As = 1.21 μs (internal transition (100%))
80
33
As = 15.2 s (β
-
(100%))
81
33
As = 33.3 s (β
-
(100%))
82
33
As = 19.1 s (β
-
(100%))
83
33
As = 13.4 s (β
-
(100%))
84
33
As = 4.02 s (β
-
(100%), β
-
n (0.28%))
84m
33
As = 650 ms (β
-
(100%))
85
33
As = 2.021 s (β
-
(100%), β
-
n (62.9%))
86
33
As = 945 ms (β
-
(100%), β
-
n (35.5%))
87
33
As = 492 ms (β
-
(100%), β
-
n (15.4%))
88
33
As = 270 ms (β
-
(100%), β
-
n )
Vapour pressure (Torr):
0.1 (317°C)
1 (371°C)
10 (437°C)
100 (519°C)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
0 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
0 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
36.6 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
24.7 (s)
Molar enthalpy (heat) of fusion Δ
fus
H (kJ/mol):
22
Enthalpy (heat) of vaporization Δ
vap
H (kJ/mol):
32
LD
50
(mg/kg):
763 (rats, oral)
144 (mice, oral)
1000 (mice, intraperitoneal)
References:
Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 11ed. - Wiley-interscience, 2004. - pp. 297
Вредные химические вещества: Неорганические соединения элементов V-VIII групп. Справочник. - Л., 1989. - pp. 82-102 [Russian]
Гринвуд Н., Эрншо А. Химия элементов. - Т.1. - М.: БИНОМ. Лаборатория знаний, 2008. - pp. 513, 516 [Russian]
Гурвич Я.А. Справочник молодого аппаратчика-химика. - М.: Химия, 1991. - pp. 51 [Russian]
Немодрук А.А. Аналитическая химия мышьяка. - М.: Наука, 1976. - pp. 7-13 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 82 [Russian]
Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 156-157 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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