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Properties of substance:

cyanamide

Group of substances:

inorganic

Physical appearance:

colorless crystals

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

CH2N2

Structural formula as text:

NH2CN

Molar/atomic mass: 42.04

Melting point (°C):

46

Decomposition temperature (°C):

80-130

CAS №: 420-04-2

Solubility (g/100 g of solvent):

acetone: soluble [Ref.]
benzene: soluble [Ref.]
carbon disulphide: sparingly soluble [Ref.]
diethyl ether: soluble [Ref.]
ethanol: soluble [Ref.]
water: 338.6 (17.5°C) [Ref.]

Density:

1.0729 (48°C, g/cm3)

Reactions of synthesis:

  1. [Ref.1]
    CO(NH2)2 + Na → NaOH + H2NCN
  2. [Ref.1]
    (NH2)2CS + HgO → H2NCN + HgS + H2O

Reactions:

  1. Yeild 65%. [Ref.1, Ref.2]
    H2NCN + SF4 → F2S=NCN + 2HF

Dissociation:

pKa (1) = 10.27 (25°C, water)

Standard molar enthalpy (heat) of formation ΔfH (298 K, kJ/mol)

58.8 (s) [Ref.]

Enthalpy (heat) of fusion ΔfusH (kJ/mol)

7.27 (s) [Ref.]

LD50 (mg/kg):

150 (rabbits, oral)

References:

  1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-19
  2. CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 3-130
  3. Journal fur Praktische Chemie. - 1880. - Vol. 21, No. 1. - pp. 129-150
  4. Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 216
  5. Yalkowsky S.H., Yan H. Handbook of aqueous solubility data. - CRC Press, 2003. - pp. 6
  6. Альберт А., Сержент Е. Константы ионизации кислот и оснований. - М.-Л.: Химия, 1964. - pp. 132 [Russian]
  7. Бьюкенен Дж. Г. Цианистые соединения и их анализ. - Л., 1933. - pp. 91 [Russian]
  8. Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.3. - Л.: Химия, 1976. - pp. 268-269 [Russian]
  9. Миллер С.А. Ацетилен, его свойства, получение и применение. - Т.1. - Л.: Химия, 1969. - pp. 244-247 [Russian]
  10. Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 524 [Russian]
  11. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 372 [Russian]
  12. Успехи химии. - 1989. - Т.58, №9. - pp. 1530 [Russian]
  13. Химическая энциклопедия. - Т. 5. - М.: Советская энциклопедия, 1999. - pp. 355 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru