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Properties of substance:

sodium iodate

Group of substances:

inorganic

Physical appearance:

colorless rhombic crystals

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

INaO3

Structural formula as text:

NaIO3

Molar/atomic mass: 197.89

Decomposition temperature (°C):

500

Solubility (g/100 g of solvent):

acetic acid: soluble [Ref.]
dimethylformamide: 0.05 (25°C) [Ref.]
ethanol: insoluble [Ref.]
ethylenediamine: insoluble [Ref.]
water: 2.48 (0°C) [Ref.]
water: 4.59 (10°C) [Ref.]
water: 9.5 (25°C) [Ref.]
water: 13.3 (40°C) [Ref.]
water: 19.8 (60°C) [Ref.]
water: 26.6 (80°C) [Ref.]
water: 33 (100°C) [Ref.]

Density:

4.4 (20°C, g/cm3)

Reactions:

  1. [Ref.1aster]
    NaIO3 + 4NaOH + Cl2 → Na3H3IO6 + 2NaCl + H2O
  2. [Ref.1aster]
    NaIO3 + 4NaOH + K2S2O8 → Na3H3IO6 + K2SO4 + Na2SO4 + H2O

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

-490.4 (s)

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

35.1 (s)

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

135 (s)

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

125.5 (s)

LD50 (mg/kg):

108 (mice, intravenous)
119 (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. 1269-1271
  3. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 84 [Russian]
  4. 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