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Properties of substance:

sodium iodide

Group of substances:

inorganic

Physical appearance:

colorless cubic crystals

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

INa

Structural formula as text:

NaI

Molar/atomic mass: 149.89

Melting point (°C):

662

Boiling point (°C):

1304

Solubility (g/100 g of solvent):

γ-butyrolactone : 58.15 (25°C) [Ref.]
γ-valerolactone: 30.03 (25°C) [Ref.]
1-butanol: 21.6 (25°C) [Ref.]
1-propanol: 28.22 (25°C) [Ref.]
2-butanol: 15 (25°C) [Ref.]
2-propanol: 26.33 (25°C) [Ref.]
N-methylformamide: 61 (25°C) [Ref.]
acetamide: 5.62 (78°C) [Ref.]
acetone: 3.3 (-34°C) [Ref.]
acetone: 13.1 (0°C) [Ref.]
acetone: 30 (20°C) [Ref.]
acetone: 39.9 (25°C) [Ref.]
acetone: 30.9 (50°C) [Ref.]
acetone: 29.9 (59.8°C) [Ref.]
acetone: 21.8 (80°C) [Ref.]
acetonitrile: 28.32 (0°C) [Ref.]
acetonitrile: 23.63 (25°C) [Ref.]
allyl alcohol: 28.49 (25°C) [Ref.]
ammonia liquid : 22 (-82°C) [Ref.]
ammonia liquid : 61 (-50°C) [Ref.]
ammonia liquid : 107.5 (-20°C) [Ref.]
ammonia liquid : 131.9 (0°C) [Ref.]
ammonia liquid : 146.3 (25°C) [Ref.]
amyl alcohol: 16.3 (25°C) [Ref.]
benzylic alcohol: 14.4 (25°C) [Ref.]
chromyl chloride: insoluble [Ref.]
cyclopentanone: 26 (25°C) [Ref.]
deuterium oxide: 141.2 (0°C) [Ref.]
deuterium oxide: 149 (10°C) [Ref.]
deuterium oxide: 164.27 (25°C) [Ref.]
deuterium oxide: 170.49 (30°C) [Ref.]
deuterium oxide: 266.3 (100°C) [Ref.]
dimethylformamide: 14.4 (25°C) [Ref.]
dimethylsulfoxide: 30 (25°C) [Ref.]
ethanol: 46 (20°C) [Ref.]
ethanol: 43.3 (25°C) [Ref.]
ethanolamine: 22 (25°C) [Ref.]
ethyl acetate: insoluble [Ref.]
ethylene carbonate: 37.6 (40°C) [Ref.]
ethylene glycol : 107.4 (25°C) [Ref.]
ethylenediamine: 34.6 (25°C) [Ref.]
formic acid: 62.71 (18°C) [Ref.]
formic acid: 61.81 (25°C) [Ref.]
furfural : 21.6 (25°C) [Ref.]
glycerol: very soluble [Ref.]
hydrazine: 61 (20°C) [Ref.]
hydrogen fluoride : reaction [Ref.]
i-butanol: 17.7 (25°C) [Ref.]
iodine liquid: very soluble [Ref.]
methanol: 65 (10°C) [Ref.]
methanol: 72.9 (20°C) [Ref.]
methanol: 78 (25°C) [Ref.]
methanol: 81.3 (27°C) [Ref.]
methanol: 81.8 (28°C) [Ref.]
methanol: 81.4 (30°C) [Ref.]
methanol: 80.7 (40°C) [Ref.]
methanol: 80.1 (50°C) [Ref.]
methanol: 79.4 (60°C) [Ref.]
methyl ethyl ketone: 22.8 (-10°C) [Ref.]
methyl ethyl ketone: 15 (20°C) [Ref.]
methyl ethyl ketone: 8.9 (50°C) [Ref.]
nitromethane: 0.3 (0°C) [Ref.]
nitromethane: 0.42 (25°C) [Ref.]
propionitrile: 11.6 (0°C) [Ref.]
propionitrile: 7.96 (25°C) [Ref.]
propylene carbonate: 16.63 (25°C) [Ref.]
pyridine: soluble [Ref.]
sulfur dioxide: 1.62 (25°C) [Ref.]
tributyl phosphate: 18.07 (22°C) [Ref.]
water: 159.7 (0°C) [Ref.]
water: 179.3 (20°C) [Ref.]
water: 184 (25°C) [Ref.]
water: 190 (30°C) [Ref.]
water: 205 (40°C) [Ref.]
water: 227 (50°C) [Ref.]
water: 257 (60°C) [Ref.]
water: 296 (80°C) [Ref.]
water: 302 (100°C) [Ref.]
water: 310 (120°C) [Ref.]
water: 320 (140°C) [Ref.]

Multicomponent solubility (in wt%):

water 55.4%, sodium iodide 32.85%, silver iodide 11.75%, 25 °C, separating phase: AgI [Ref.]
water 26.21%, sodium iodide 41.13%, silver iodide 32.66%, 25 °C, separating phase: AgI [Ref.]
water 23.27%, sodium iodide 41.83%, silver iodide 34.9%, 25 °C, separating phase: AgI + 2AgI * 2NaI * 7H2O [Ref.]
water 22.44%, sodium iodide 50.19%, silver iodide 27.37%, 25 °C, separating phase: 2AgI * 2NaI * 7H2O [Ref.]
water 30.72%, sodium iodide 59.73%, silver iodide 9.95%, 25 °C, separating phase: NaI [Ref.]
water 98.9528%, sodium iodide 1.045%, lead iodide 0.0022%, 25 °C, separating phase: PbI2 [Ref.]
water 61.13%, sodium iodide 33.44%, lead iodide 5.43%, 25 °C, separating phase: PbI2 [Ref.]
water 22.84%, sodium iodide 42.57%, lead iodide 34.59%, 25 °C, separating phase: PbI2 + NaI * PbI2 * 4H2O [Ref.]
water 22.89%, sodium iodide 46.62%, lead iodide 30.49%, 25 °C, separating phase: 2NaI * PbI2 * 6H2O [Ref.]
water 32.8%, sodium iodide 61.23%, lead iodide 5.97%, 25 °C, separating phase: NaI * 2H2O [Ref.]

Properties of solutions:

10% (wt.), solvent - water
  Density of a material to that water at 4°C = 1.0807 (20°)
60% (wt.), solvent - water
  Density of a material to that water at 4°C = 1.8038 (20°)

Hygroscopic:

yes

Density:

3.665 (4°C, g/cm3)

Reactions:

  1. Yeild 93-98%. [Ref.1aster]
    NaI + 4Br2 + 10NaOH → Na3H2IO6 + 8NaBr + 4H2O

Vapour pressure (Torr):

0.1 (597°C)
1 (768°C)
10 (903°C)
100 (1083°C)

Viscosity (mPa·s):

1.45 (677°C)
1.18 (747°C)
0.96 (827°C)

Surface tension (mN/m):

83 (760°C)

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

-287.9 (s)

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

-284.6 (s)

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

98.5 (s)

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

52.22 (s)

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

22

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

160

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

-77 (g)

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

248.87 (g)

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

36.64 (g)

LD50 (mg/kg):

4340 (rats, oral)
1060 (rats, intravenous)
1000 (mice, oral)
430 (mice, intraperitoneal)

References:

  1. Lewis R.J. Sax's Dangerous Properties of Industrial Materials. - 12ed., Vol. 1-5. - Wiley, 2012. - pp. 4017
  2. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1262-1269
  3. Беликов В.Г. Учебное пособие по фармацевтической химии. - М.: Медицина, 1979. - pp. 18 [Russian]
  4. Лурье Ю.Ю. Справочник по аналитической химии. - М.: Химия, 1971. - pp. 93 [Russian]
  5. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 84 [Russian]
  6. Реми Г. Курс неорганической химии. - Т.1. - М., 1963. - pp. 850 [Russian]
  7. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 660-663, 738-739 [Russian]
  8. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 363 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru