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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):

As2S3

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/cm3)

Dissociation:

pKsp (0) = 28.4 (18°C, water)

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

-159 (s)

Standard molar Gibbs energy of formation ΔfG0 (298.15 K, kJ/mol):

-158 (s)

Standard molar entropy S0 (298.15 K, J/(mol·K)):

163.6 (s)

Molar heat capacity at constant pressure Cp (298.15 K, J/(mol·K)):

115.5 (s)

LD50 (mg/kg):

6400 (rats, oral)
936 (rats, onto the skin)

References:

  1. Patnaik P. Handbook of inorganic chemicals. - McGraw-Hill, 2003. - pp. 66-67
  2. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 113
  3. Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.3. - Л.: Химия, 1976. - pp. 216 [Russian]
  4. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 82 [Russian]
  5. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 46 [Russian]
  6. Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 160-161 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru