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Properties of substance:

sodium nitrate

Group of substances:

inorganic

Physical appearance:

white trigonal crystals

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

NNaO3

Structural formula as text:

NaNO3

Molar/atomic mass: 84.99

Melting point (°C):

307

Decomposition temperature (°C):

380

Solubility (g/100 g of solvent):

acetic acid: 0.173 (27°C) [Ref.]
acetic acid: 0.197 (29°C) [Ref.]
acetic acid: 0.246 (40°C) [Ref.]
acetic acid: 1.22 (103°C) [Ref.]
acetone: insoluble [Ref.]
acetonitrile: 0.0255 (25°C) [Ref.]
ammonia liquid : 98 (-35°C) [Ref.]
ammonia liquid : 127 (0°C) [Ref.]
diethyl ether: 0.0196 (20°C) [Ref.]
dimethylformamide: 15.4 (25°C) [Ref.]
dimethylsulfoxide: 20 (25°C) [Ref.]
ethanol: 0.036 (25°C) [Ref.]
ethanol 50%: 19.4 (20°C) [Ref.]
ethylenediamine: 33.5 (25°C) [Ref.]
hydrazine: 100 (20°C) [Ref.]
hydrogen fluoride : soluble [Ref.]
hydrogen peroxide: 30.9 (0°C) [Ref.]
hydroxylamine: 13.1 (18°C) [Ref.]
methanol: 0.41 (25°C) [Ref.]
nitric acid: 1.5 (20°C) [Ref.]
pyridine: 0.35 (25°C) [Ref.]
water: 72.7 (0°C) [Ref.]
water: 79.9 (10°C) [Ref.]
water: 87.6 (20°C) [Ref.]
water: 91.6 (25°C) [Ref.]
water: 96.1 (30°C) [Ref.]
water: 104.9 (40°C) [Ref.]
water: 114.1 (50°C) [Ref.]
water: 124.7 (60°C) [Ref.]
water: 149 (80°C) [Ref.]
water: 176 (100°C) [Ref.]

Multicomponent solubility (in wt%):

water 39.6%, IPA 49.5%, sodium nitrate 10.9%, 25 °C [Ref.]
water 56.35%, IPA 19.25%, sodium nitrate 24.4%, 25 °C [Ref.]
water 53.2%, IPA 3.%, sodium nitrate 43.8%, 25 °C [Ref.]
water 41.86%, nitric acid 5.2%, potassium nitrate 17.68%, sodium nitrate 35.26%, 25 °C, separating phase: NaNO3 + KNO3 [Ref.]
water 37.13%, nitric acid 38.98%, potassium nitrate 16.74%, sodium nitrate 7.15%, 25 °C, separating phase: NaNO3 + KNO3 * 2HNO3 [Ref.]
water 33.07%, nitric acid 62.59%, potassium nitrate 1.02%, sodium nitrate 3.32%, 25 °C, separating phase: NaNO3 + KNO3 * 2HNO3 [Ref.]

Properties of solutions:

10% (wt.), solvent - water
  Dynamic viscosity (mPa·s) = 1.081 (20°)
  Density (g/cm3) = 1.0674 (20°)
  Index of refraction = 1.3443 (20°)
  Freezing point (°C) = -3.84

Numerical data:

Critical relative humidity (%): 73.9

Density:

2.26 (20°C, g/cm3)

Reactions:

  1. Dry sodium nitrate heated above 300°C with nitrosyl chloride forms sodium chloride and nitrogen dioxide. [Ref.1]
    NOCl + NaNO3 → NaCl + 2NO2
  2. Yeild 60%. [Ref.1aster]
    NaNO3 + 3NaNH2 → NaN3 + 3NaOH + NH3
  3. [Ref.1]
    2NaNO3 → 2Na + 2NO2 + O2

Viscosity (mPa·s):

2.86 (317°C)
2.01 (387°C)
1.52 (457°C)

Surface tension (mN/m):

119 (320°C)
117 (350°C)
114 (400°C)

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

-466.7 (s)

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

-365.9 (s)

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

116 (s)

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

93.05 (s)

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

16

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

-257 (g)

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

300 (g)

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

67 (g)

LD50 (mg/kg):

6000 (, oral)
9000 (, oral)
3500 (mice, oral)

References:

  1. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1275-1283
  2. Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.3. - Л.: Химия, 1976. - pp. 119-120 [Russian]
  3. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 430 [Russian]
  4. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 84 [Russian]
  5. Справочник азотчика. - М.: Химия, 1987. - pp. 219-221 [Russian]
  6. 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