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Properties of substance:

methylamine



skc-file

Synonyms:

carbinamine
aminomethane

Group of substances:

organic

Physical appearance:

colorless gas

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

CH5N

Structural formula as text:

CH3NH2

CAS No: 74-89-5

Molar/atomic mass: 31.06

Melting point (°C):

-93.5

Boiling point (°C):

-6.5

Decomposition temperature (°C):

1200-1300

Solubility (g/100 g of solvent):

1-butanol: 55.67 (20°C) [Ref.]
acetone: soluble [Ref.]
ammonia liquid : miscible [Ref.]
aniline: 39.54 (20°C) [Ref.]
benzene: soluble [Ref.]
diethyl ether: miscible [Ref.]
ethanol: 82.89 (20°C) [Ref.]
methanol: 123.2 (20°C) [Ref.]
nitrobenzene: 10.91 (20°C) [Ref.]
water: 59.51 (20°C) [Ref.]
water: 55.56 (25°C) [Ref.]
water: 28.06 (60°C) [Ref.]

Density:

0.699 (-11°C, g/cm3)

    Dissociation:

    pKBH+ (1) = 10.62 (25°C, water)

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

    -47.3 (l)

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

    35.7 (l)

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

    150.2 (l)

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

    102.1 (l)

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

    -22.5 (g)

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

    32.7 (g)

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

    242.9 (g)

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

    50.1 (g)

    Enthalpy (heat) of solution ΔsolH (kJ)

    -45,49 (g) [solvent: water, 18°C, 1 mol in 1000 mol of water] [Ref.]
    -44,78 (g) [Ref.]

    LD50 (mg/kg):

    2500 (mice, subcutaneous)

    Critical temperature (°C):

    156.9

    Critical pressure (MPa):

    7.22

    References:

    1. Beilsteins Handbuch der Organischen Chemie. - Vierte Auflage, 4 Band. - Berlin: Verlag von Julius Springer, 1922. - pp. 32-36
    2. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-20
    3. Dictionary of organic compounds. - Vol. 2, Eccaine - Myrtillin chloride. - London, 1946. - pp. 611
    4. Flick E.W. Industrial solvent handbook. - 5ed. - 1998. - pp. 686
    5. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 64-65
    6. The Merck Index 11th ed., Merck & Company, 1989. - pp. 949
    7. Yalkowsky S.H., Yan H. Handbook of aqueous solubility data. - CRC Press, 2003. - pp. 14
    8. Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.2. - Л.: Химия, 1976. - pp. 221 [Russian]
    9. Досон Р., Эллиот Д., Эллиот У., Джонс К. Справочник биохимика. - М.: Мир, 1991. - pp. 28 [Russian]
    10. Краткая химическая энциклопедия. - Т. 3: Мальтаза-Пиролиз. - М.: Советская энциклопедия, 1964. - pp. 180 [Russian]
    11. Новый справочник химика и технолога. Химическое равновесие. Свойства растворов. - СПб.: НПО Профессионал, 2004, 2007. - pp. 80 [Russian]
    12. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 160 [Russian]
    13. Справочник по растворимости. - Т.1, Кн.2. - М.-Л.: ИАН СССР, 1962. - pp. 1159 [Russian]
    14. Химическая энциклопедия. - Т. 3. - М.: Советская энциклопедия, 1992. - pp. 57-58 [Russian]
    15. Химический энциклопедический словарь. - Под ред. Кнунянц И.Л. - М.: Советская энциклопедия, 1983. - pp. 326 [Russian]
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      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru