Main page (Russian) Search in database (English)
Sitemap (Russian)

Properties of substance:

butanoic acid


n-butyric acid;

Physical appearance:

colorless liquid

Empirical formula (Hill's system):

C4H8O2

Structural formula:

CH3CH2CH2COOH

Molar/atomic mass: 88.105

Melting point (°C):

-5.26

Boiling point (°C):

163.5

Solubility (g/100 g of solvent):

water: miscible (-4.1°C)
diethyl ether: miscible (-4.1°C)
hydrogen fluoride : very soluble
ethanol: miscible (-4.1°C)

Density:

0.9577 (20°C, g/cm3)

Index of refraction:

1.398 (20°C)

    Dissociation:

    pKa (1) = 4.82 (25°C, water)

    Permittivity (dielectric constant):

    2.97 (20°C)

    Dipole moment (D):

    0.93 (20°C)

    Viscosity (mPa·s):

    1.814 (15°C)

    Surface tension (mN/m):

    26.74 (20°C)

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

    -533.8 (l)

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

    222.2 (l)

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

    178.6 (l)

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

    -475.9 (g)

    Critical temperature (°C):

    355

    Critical pressure (MPa):

    5.27

    References:

    1. CRC Handbook of Chemistry and Physics. - 90ed. - CRC Press, 2010. - pp. 5-26
    2. Dictionary of organic compounds. - vol.1, Abietic acid - Dypnone. - London, 1946. - pp. 372
    3. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 250-258
    4. Вредные вещества в промышленности: Справочник для химиков, инженеров и врачей. - 7-е изд., Т.2. - Л.: Химия, 1976. - pp. 12
    5. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 159
    6. Справочник по растворимости. - Т.1, Кн.1. - М.-Л.: ИАН СССР, 1961. - pp. 399-400
    7. Химическая энциклопедия. - Т.2. - М.: Советская энциклопедия, 1990. - pp. 652
      What information do you need?



      © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru