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Properties of substance:
arsenic(III) sulfide
Synonyms:
arsenic trisulfide
Group of substances:
inorganic
Physical appearance:
yellow monoclinic crystals
Empirical formula (Hill's system for organic substances):
As
2
S
3
Structural formula as text:
As2S3
Molar/atomic mass: 246.02
Melting point (°C):
310
Boiling point (°C):
723
Solubility (g/100 g of solvent):
ammonia liquid
: soluble [
Ref.
]
arsenic tribromide
: soluble [
Ref.
]
benzene
: insoluble [
Ref.
]
carbon disulphide
: insoluble [
Ref.
]
ethanol
: soluble [
Ref.
]
water
: 0.00005 (18°C) [
Ref.
]
Density:
3.43 (20°C, g/cm
3
)
Dissociation:
pK
sp
(0) = 28.4 (18°C, water)
Standard molar enthalpy (heat) of formation Δ
f
H
0
(298.15 K, kJ/mol):
-159 (s)
Standard molar Gibbs energy of formation Δ
f
G
0
(298.15 K, kJ/mol):
-158 (s)
Standard molar entropy S
0
(298.15 K, J/(mol·K)):
163.6 (s)
Molar heat capacity at constant pressure C
p
(298.15 K, J/(mol·K)):
115.5 (s)
LD
50
(mg/kg):
6400 (rats, oral)
936 (rats, onto the skin)
References:
Patnaik P. Handbook of inorganic chemicals. - McGraw-Hill, 2003. - pp. 66-67
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 113
Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.3. - Л.: Химия, 1976. - pp. 216 [Russian]
Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 82 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 46 [Russian]
Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 160-161 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru