Main page (Russian) Search in database (English)

Properties of substance:

octane



skc-file

Synonyms:

n-octane

Group of substances:

organic

Physical appearance:

colorless liquid

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

C8H18

Structural formula as text:

CH3(CH2)6CH3

Molar/atomic mass: 114.23

Melting point (°C):

-56.795

Boiling point (°C):

125.665

CAS №: 111-65-9

Solubility (g/100 g of solvent):

acetone: miscible [Ref.]
benzene: miscible [Ref.]
chloroform: miscible [Ref.]
diethyl ether: soluble [Ref.]
ethanol: soluble [Ref.]
methanol: 15.1 (5°C) [Ref.]
methanol: 17 (10°C) [Ref.]
methanol: 19 (15°C) [Ref.]
methanol: 21.1 (20°C) [Ref.]
methanol: 23.3 (25°C) [Ref.]
methanol: 26.4 (30°C) [Ref.]
methanol: 29.5 (35°C) [Ref.]
methanol: 33.8 (40°C) [Ref.]
methanol: miscible (65.7°C) [Ref.]
petroleum ether: miscible [Ref.]
water: 0.000066 (25°C) [Ref.]

Density:

0.70252 (20°C, g/cm3)

Refractive index (nD):

1.39743 (20°C)

Vapour pressure (Torr):

1 (-14°C)
10 (19.2°C)
40 (45.1°C)
100 (65.7°C)
400 (104°C)

Permittivity (dielectric constant):

1.948 (20°C)

Viscosity (mPa·s):

0.542 (20°C)

Surface tension (mN/m):

21.8 (20°C)

Speed sound (m/s):

1192 (20°C, aggregative state - liquid)

Molar enthalpy (heat) of fusion ΔfusH (kJ/mol):

20.65

Enthalpy (heat) of vaporization ΔvapH (kJ/mol):

41.48

Flash point (°C):

13

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

-250.1 (l) [Ref.]
-208.5 (g) [Ref.]

Standard molar Gibbs energy of formation ΔfG (298 K, kJ/mol)

15.79 (g) [Ref.]

Standard molar entropy S (298 K, J/(mol·K))

466 (g) [Ref.]

Molar heat capacity at constant pressure Cp (298 K, J/(mol·K))

254.6 (l) [Ref.]

Heat of combustion (kJ/mol)

5450.5 (l) [Ref.]

Critical temperature (°C):

296.2

Critical pressure (MPa):

2.5

References:

  1. Gallant R.W., Railey J.M. Physical Properties of Hydrocarbons. - 2 ed., vol. 1 - Houston, 1992. - pp. 157-164
  2. Journal of Chemical and Engineering Data. - 1961. - Vol. 6, No. 3. - pp. 339
  3. Seidell A. Solubilities of organic compounds. - 3ed., vol.2. - New York: D. Van Nostrand Company, 1941. - pp. 621
  4. Smallwood I.M. Handbook of organic solvent properties. - 1996. - pp. 15-17
  5. Yalkowsky S.H., Yan H. Handbook of aqueous solubility data. - CRC Press, 2003. - pp. 536-537
  6. Воскресенский П.И., Каверина А.А., Парменов К.Я., Цветков Л.А., Эпштейн Д.А. Справочник по химии. - 4 изд. - М.: Просвещение, 1978. - pp. 200 [Russian]
  7. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 169 [Russian]
  8. Справочник химика. - 2 изд., Т.1. - Л.-М.: Химия, 1966. - pp. 650 [Russian]

    What information do you need?




    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru