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Properties of substance:

potassium thiocyanate

Group of substances:

inorganic

Physical appearance:

colorless rhombic crystals

Empirical formula (Hill's system for organic substances):

CKNS

Structural formula as text:

KSCN

Molar/atomic mass: 97.18

Melting point (°C):

173.2

Boiling point (°C):

500

Decomposition temperature (°C):

250

Solubility (g/100 g of solvent):

acetone: 20.75 (22°C) [Ref.]
acetone: 20.4 (58°C) [Ref.]
acetonitrile: 11.31 (18°C) [Ref.]
ammonia liquid : soluble [Ref.]
amyl alcohol: 0.18 (13°C) [Ref.]
amyl alcohol: 1.34 (65°C) [Ref.]
amyl alcohol: 2.14 (100°C) [Ref.]
benzonitrile: sparingly soluble [Ref.]
deuterium oxide: 208.6 (25°C) [Ref.]
dimethylformamide: 18.2 (25°C) [Ref.]
ethanol: 20.75 (22°C) [Ref.]
ethyl acetate: 0.44 (10°C) [Ref.]
ethyl acetate: 0.4 (14°C) [Ref.]
ethyl acetate: 0.2 (79°C) [Ref.]
ethylene carbonate: soluble (40°C) [Ref.]
ethylenediamine: 83 (25°C) [Ref.]
formamide: 88.6 (25°C) [Ref.]
hydrogen cyanide: soluble [Ref.]
methyl acetate: soluble [Ref.]
methylamine: very soluble [Ref.]
phosphorus(V) trichloride oxide: 0.046 (20°C) [Ref.]
propylene carbonate: 10.59 (25°C) [Ref.]
propylene carbonate: 12.92 (30°C) [Ref.]
propylene carbonate: 16.71 (35°C) [Ref.]
propylene carbonate: 19.14 (40°C) [Ref.]
propylene carbonate: 20.4 (45°C) [Ref.]
pyridine: 6.75 (0°C) [Ref.]
pyridine: 6.15 (20°C) [Ref.]
pyridine: 4.97 (58°C) [Ref.]
pyridine: 3.88 (97°C) [Ref.]
sulfur dioxide: 4.87 (0°C) [Ref.]
tributyl phosphate: 6.96 (22°C) [Ref.]
water: 177 (0°C) [Ref.]
water: 217 (20°C) [Ref.]
water: 239 (25°C) [Ref.]
water: 265 (32.5°C) [Ref.]
water: 317 (47.3°C) [Ref.]
water: 408 (67°C) [Ref.]
water: 673 (99°C) [Ref.]

Hygroscopic:

yes

Density:

1.89 (20°C, g/cm3)

Reactions:

  1. Yeild 100%. [Ref.1]
    KSCN + 8Br2 + 4H2O → BrCN + KBr + H2SO4 + 6HBr

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

-202.2 (s)

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

124.3 (s)

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

88.5 (s)

Molar enthalpy (heat) of fusion ΔfusH (kJ/mol):

10.5

LD50 (mg/kg):

590 (mice, oral)

References:

  1. Comey A. M., Hahn D. A. A dictionary of Chemical Solubilities Inorganic. - 2 ed. - New York, The MacMillan Company, 1921. - pp. 883-884
  2. Vanderzee C.E., Westrum E.F. Jr. Heat capacities and thermodynamic properties of ammonium and potassium thiocyanates from 5 to 340 K / Journal of Chemical Thermodynamics. - 1970. - Vol. 2, No. 3. - pp. 417-429
  3. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 724-725
  4. Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.3. - Л.: Химия, 1976. - pp. 274-275 [Russian]
  5. Краткая химическая энциклопедия. - Т. 2: Ж-Малоновый эфир. - М.: Советская энциклопедия, 1963. - pp. 357 [Russian]
  6. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 527 [Russian]
  7. Неорганическая химия. - Под ред. Третьякова Ю.Д., Т.2. - М.: Academa, 2004. - pp. 150-151 [Russian]
  8. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 69 [Russian]
  9. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 155, 694-695 [Russian]
  10. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 84-85 [Russian]
  11. Химическая энциклопедия. - Т. 4. - М.: Советская энциклопедия, 1995. - pp. 586-587 [Russian]
  12. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 234 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru