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Properties of substance:

iron(II) chloride

Group of substances:

inorganic

Physical appearance:

trigonal crystals

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

Cl2Fe

Structural formula as text:

FeCl2

Molar/atomic mass: 126.75

Melting point (°C):

677

Boiling point (°C):

1012

Solubility (g/100 g of solvent):

acetone: soluble [Ref.]
diethyl ether: insoluble [Ref.]
ethanol: 100 (20°C) [Ref.]
ethyl acetate: insoluble [Ref.]
water: 49.7 (0°C) [Ref.]
water: 62.6 (20°C) [Ref.]
water: 68.6 (40°C) [Ref.]
water: 78.3 (60°C) [Ref.]
water: 94.2 (100°C) [Ref.]

Hygroscopic:

yes

Density:

2.98 (20°C, g/cm3)

Reactions of synthesis:

  1. [Ref.1]
    2FeCl3 + Fe → 3FeCl2

Vapour pressure (Torr):

10 (681°C)
100 (828°C)

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

-341.75 (s)

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

-302.35 (s)

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

118 (s)

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

76.36 (s)

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

43.01

Enthalpy (heat) of vaporization ΔvapH (kJ/mol):

125.5

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

-132.5 (g)

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

299 (g)

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

57.7 (g)

LD50 (mg/kg):

450 (rats, oral)
59 (mice, intraperitoneal)

Neel temperature (K):

23

References:

  1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 524-531
  2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 64 [Russian]
  3. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 349 [Russian]
  4. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 62-63 [Russian]
  5. Фурман А.А. Неорганические хлориды (химия и технология). - М.: Химия, 1980. - pp. 386-388 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru