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Properties of substance:

sodium nitrite

Group of substances:

inorganic

Physical appearance:

colorless rhombic crystals

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

NNaO2

Structural formula as text:

NaNO2

Molar/atomic mass: 68.995

Melting point (°C):

271

Decomposition temperature (°C):

320

Solubility (g/100 g of solvent):

ammonia liquid : 79.02 (-33°C) [Ref.]
ammonia liquid : 87.37 (0°C) [Ref.]
dimethylsulfoxide: 1 (25°C) [Ref.]
ethanol abs.: 0.31 (19.5°C) [Ref.]
ethyl acetate: insoluble [Ref.]
hydrazine: 100 (20°C) [Ref.]
hydrogen peroxide: 33.73 (11.8°C) [Ref.]
methanol: 4.43 (19.5°C) [Ref.]
methyl acetate: insoluble [Ref.]
pyridine: very soluble [Ref.]
water: 71.4 (0°C) [Ref.]
water: 82.9 (20°C) [Ref.]
water: 95.7 (40°C) [Ref.]
water: 112.3 (60°C) [Ref.]
water: 135.5 (80°C) [Ref.]
water: 160 (100°C) [Ref.]

Density:

2.17 (20°C, g/cm3)

Viscosity (mPa·s):

3.04 (297°C)
2.31 (337°C)

Surface tension (mN/m):

121 (280°C)
113 (500°C)

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

-359 (s)

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

-295 (s)

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

106 (s)

LD50 (mg/kg):

200.5 (rats, oral)

References:

  1. Comey A. M., Hahn D. A. A dictionary of Chemical Solubilities Inorganic. - 2 ed. - New York, The MacMillan Company, 1921. - pp. 629-630
  2. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1273-1275
  3. Некрасов Б.В. Основы общей химии. - Т.2. - М.: Химия, 1973. - pp. 238 [Russian]
  4. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 84 [Russian]
  5. Справочник азотчика. - М.: Химия, 1987. - pp. 221-222 [Russian]
  6. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 667-668 [Russian]
  7. 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