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Properties of substance:

dimethylamine



skc-file

Group of substances:

organic

Physical appearance:

colorless gas

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

C2H7N

Structural formula as text:

(CH3)2NH

CAS No: 124-40-3

Molar/atomic mass: 45.09

Melting point (°C):

-93

Boiling point (°C):

7.4

Decomposition temperature (°C):

800-1000

Solubility (g/100 g of solvent):

1-butanol: 134.4 (20°C) [Ref.]
diethyl ether: soluble [Ref.]
ethanol: 198.8 (20°C) [Ref.]
methanol: 271.3 (20°C) [Ref.]
nitrobenzene: 40.7 (20°C) [Ref.]
water: very soluble [Ref.]

Density:

0.6804 (0°C, g/cm3)

Vapour pressure (Torr):

1 (-87.7°C)
10 (-64.6°C)
40 (-46.7°C)
100 (-32.6°C)
400 (-7.1°C)
1520 (25°C)
3800 (53.9°C)
7600 (80°C)
15200 (111.7°C)
38000 (162.6°C)

    Dissociation:

    pKBH+ (1) = 10.71 (25°C, water)

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

    -18.8 (g)

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

    68.5 (g)

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

    273.1 (g)

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

    70.7 (g)

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

    -43.9 (l)

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

    70 (l)

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

    182.3 (l)

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

    137.7 (l)

    LD50 (mg/kg):

    316 (white mice, oral)
    698 (rats, oral)

    Critical temperature (°C):

    164.5

    Critical pressure (MPa):

    5.14

    References:

    1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-23
    2. Flick E.W. Industrial solvent handbook. - 5ed. - 1998. - pp. 686-687
    3. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 160
    4. The Merck Index 11th ed., Merck & Company, 1989. - pp. 509
    5. Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.2. - Л.: Химия, 1976. - pp. 221-222 [Russian]
    6. Корольченко А.Я., Корольченко Д.А. Пожаровзрывоопасность веществ и материалов и средства их тушения. - 2 изд, Ч.1. - М.: Ассоциация Пожнаука, 2004. - pp. 426 [Russian]
    7. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 143 [Russian]
    8. Токсикологический вестник. - 2008. - №2. - pp. 41 [Russian]
    9. Хёрд Ч.Д. Пиролиз соединений углерода. - Л.-М.: ГОНТИ РКТП СССР, 1938. - pp. 275 [Russian]
    10. Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 57-58 [Russian]
    11. Шефтель В.О. Полимерные материалы: Токсические свойства. - Л.: Химия, 1982. - pp. 107 [Russian]
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru