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Properties of substance:

sodium cyanate



skc-file

Group of substances:

inorganic

Physical appearance:

colorless trigonal crystals

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

CNNaO

Structural formula as text:

NaOCN

Molar/atomic mass: 65.01

Melting point (°C):

550

Solubility (g/100 g of solvent):

ammonia liquid : sparingly soluble [Ref.]
benzene: 0.13 (80°C) [Ref.]
diethyl ether: insoluble [Ref.]
dimethylformamide: 0.05 (25°C) [Ref.]
ethanol: 0.22 (0°C) [Ref.]
ethanol: 0.5 (78.4°C) [Ref.]
water: 11.6 (25°C) [Ref.]

Density:

1.893 (20°C, g/cm3)

Reactions:

  1. [Ref.1]
    4NaOCN + 6H2O → 2Na2CO3 + (NH4)2CO3 + (H2N)2CO

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

-400 (s)

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

119.2 (s)

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

86.6 (s)

LD50 (mg/kg):

1500 (rats, oral)
260 (mice, intraperitoneal)

References:

  1. Canadian Journal of Chemistry. - 1955. - Vol. 33, No. 2. - pp. 426-440 [DOI: 10.1139/v55-050]
  2. Dong, K., Xie, F., Chang, Y., Chen, C., Wang, W., Lu, D., & Gu, X. A novel strategy for the efficient decomposition of toxic sodium cyanate by hematite / Chemosphere. - 2020. - Vol. 256 [DOI: 10.1016/j.chemosphere.2020.127047]
  3. Dean J.A. Lange's handbook of chemistry. - 1999. - pp. 3.49
  4. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 1190
  5. Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.3. - Л.: Химия, 1976. - pp. 273-274 [Russian]
  6. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 664 [Russian]
  7. Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 189 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru