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Properties of substance:
cyanamide
Group of substances:
inorganic
Physical appearance:
colorless crystals
Empirical formula (Hill's system for organic substances):
CH
2
N
2
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/cm
3
)
Reactions of synthesis:
[
Ref.1
]
CO(NH
2
)
2
+ Na → NaOH + H
2
NCN
[
Ref.1
]
(NH
2
)
2
CS + HgO → H
2
NCN + HgS + H
2
O
Reactions:
Yeild 65%. [
Ref.1
,
Ref.2
]
H
2
NCN + SF
4
→ F
2
S=NCN + 2HF
Dissociation:
pK
a
(1) = 10.27 (25°C, water)
Standard molar enthalpy (heat) of formation Δ
f
H (298 K, kJ/mol)
58.8 (s) [
Ref.
]
Enthalpy (heat) of fusion Δ
fus
H (kJ/mol)
7.27 (s) [
Ref.
]
LD
50
(mg/kg):
150 (rabbits, oral)
References:
CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-19
CRC Handbook of Chemistry and Physics. - 95ed. - CRC Press, 2014. - pp. 3-130
Journal fur Praktische Chemie. - 1880. - Vol. 21, No. 1. - pp. 129-150
Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1. - New York: D. Van Nostrand Company, 1940. - pp. 216
Yalkowsky S.H., Yan H. Handbook of aqueous solubility data. - CRC Press, 2003. - pp. 6
Альберт А., Сержент Е. Константы ионизации кислот и оснований. - М.-Л.: Химия, 1964. - pp. 132 [Russian]
Бьюкенен Дж. Г. Цианистые соединения и их анализ. - Л., 1933. - pp. 91 [Russian]
Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.3. - Л.: Химия, 1976. - pp. 268-269 [Russian]
Миллер С.А. Ацетилен, его свойства, получение и применение. - Т.1. - Л.: Химия, 1969. - pp. 244-247 [Russian]
Некрасов Б.В. Основы общей химии. - Т.1. - М.: Химия, 1973. - pp. 524 [Russian]
Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 372 [Russian]
Успехи химии. - 1989. - Т.58, №9. - pp. 1530 [Russian]
Химическая энциклопедия. - Т. 5. - М.: Советская энциклопедия, 1999. - pp. 355 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru