Octacosane

• Formula: C₂₈H₅₈
• Molecular weight: 394.7601
• IUPAC Standard InChI: InChI=1S/C28H58/c1-3-5-7-9-11-13-15-17-19-21-23-25-27-28-26-24-22-20-18-16-14-12-10-8-6-4-2/h3-28H2,1-2H3 Copy

  
• IUPAC Standard InChIKey: ZYURHZPYMFLWSH-UHFFFAOYSA-N Copy
• CAS Registry Number: 630-02-4
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
  The 3d structure may be viewed using Java or Javascript.
• Other names: n-Octacosane
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Condensed phase thermochemistry data
  • Phase change data
  • References
  • Notes
• Other data available:
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • Gas Chromatography
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Condensed phase thermochemistry data

Go To: Top, Phase change data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of liquid

Phase change data

Go To: Top, Condensed phase thermochemistry data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
CAL - James S. Chickos, William E. Acree, Jr., Joel F. Liebman, Students of Chem 202 (Introduction to the Literature of Chemistry), University of Missouri -- St. Louis
DH - Eugene S. Domalski and Elizabeth D. Hearing

Reduced pressure boiling point

Enthalpy of vaporization

Enthalpy of sublimation

Enthalpy of fusion

Entropy of fusion

Enthalpy of phase transition

Entropy of phase transition

References

Go To: Top, Condensed phase thermochemistry data, Phase change data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Atkinson, Larkin, et al., 1969
Atkinson, C.M.L.; Larkin, J.A.; Richardson, M.J., Enthalpy changes in molten n-alkanes and polyethylene, J. Chem. Thermodynam., 1969, 1, 435-445. [all data]

Weast and Grasselli, 1989
CRC Handbook of Data on Organic Compounds, 2nd Editon, Weast,R.C and Grasselli, J.G., ed(s)., CRC Press, Inc., Boca Raton, FL, 1989, 1. [all data]

Domanska and Wyrzykowska-Stankiewicz, 1991
Domanska, U.; Wyrzykowska-Stankiewicz, D., Enthalpies of fusion and solid-solid transition of even-numbered paraffins docosane, hexacosane, octacosane and tetracosane, Thermochim. Acta, 1991, 179, 265-71. [all data]

Chickos and Hanshaw, 2004
Chickos, James S.; Hanshaw, William, Vapor Pressures and Vaporization Enthalpies of the n -Alkanes from C ₂₁ to C ₃₀ at T = 298.15 K by Correlation Gas Chromatography, J. Chem. Eng. Data, 2004, 49, 1, 77-85, https://doi.org/10.1021/je0301747 . [all data]

Chickos, Webb, et al., 2002
Chickos, James S.; Webb, Paul; Nichols, Gary; Kiyobayashi, Tetsu; Cheng, Pei-Chao; Scott, Lawrence, The enthalpy of vaporization and sublimation of corannulene, coronene, and perylene at T= 298.15 K, The Journal of Chemical Thermodynamics, 2002, 34, 8, 1195-1206, https://doi.org/10.1006/jcht.2002.0977 . [all data]

Nichols, Orf, et al., 2000
Nichols, Gary; Orf, Jennifer; Reiter, Sarah M.; Chickos, James; Gokel, George W., The vaporization enthalpies of some crown and polyethers by correlation gas chromatography, Thermochimica Acta, 2000, 346, 1-2, 15-28, https://doi.org/10.1016/S0040-6031(99)00405-0 . [all data]

Chickos and Wilson, 1997
Chickos, James S.; Wilson, Joe A., Vaporization Enthalpies at 298.15 K of the n -Alkanes from C ₂₁ to C ₂₈ and C ₃₀, J. Chem. Eng. Data, 1997, 42, 1, 190-197, https://doi.org/10.1021/je960089h . [all data]

Piacente, Pompili, et al., 1991
Piacente, Vincenzo; Pompili, Tiziano; Scardala, Paolo; Ferro, Daniela, Temperature dependence of the vaporization enthalpies of n-alkanes from vapour-pressure measurements, The Journal of Chemical Thermodynamics, 1991, 23, 4, 379-396, https://doi.org/10.1016/S0021-9614(05)80092-8 . [all data]

Aldrich Chemical Company Inc., 1990
Aldrich Chemical Company Inc., Catalog Handbook of Fine Chemicals, Aldrich Chemical Company, Inc., Milwaukee WI, 1990, 1. [all data]

Razzouk, Naccoul, et al., 2009
Razzouk, Antonio; Naccoul, Ramy Abou; Mokbel, Ilham; Saab, Joseph; Jose, Jacques, Vapor and Sublimation Pressures of Three Normal Alkanes: C ₂₀ , C ₂₄ , and C ₂₈, J. Chem. Eng. Data, 2009, 54, 4, 1214-1219, https://doi.org/10.1021/je800534x . [all data]

Mokbel, Razzouk, et al., 2007
Mokbel, Ilham; Razzouk, Antonio; Hajjaji, Ahmed; Msakni, Nizar; Jose, Jacques, A Gas Saturation Apparatus for Very Low Vapor or Sublimation Pressure Measurements (10 ^-3 Pa): Vapor-Liquid Equilibria of n -Alkanes ( n -C ₁₀ , n -C ₂₄ , n -C ₂₈ ), J. Chem. Eng. Data, 2007, 52, 5, 1720-1725, https://doi.org/10.1021/je7001122 . [all data]

Morgan and Kobayashi, 1994
Morgan, David L.; Kobayashi, Riki, Direct vapor pressure measurements of ten n-alkanes m the 10-C28 range, Fluid Phase Equilibria, 1994, 97, 211-242, https://doi.org/10.1016/0378-3812(94)85017-8 . [all data]

Piacente, Fontana, et al., 1994
Piacente, Vincenzo; Fontana, Danilo; Scardala, Paolo, Enthalpies of Vaporization of a Homologous Series of n-Alkanes Determined from Vapor Pressure Measurements, J. Chem. Eng. Data, 1994, 39, 2, 231-237, https://doi.org/10.1021/je00014a009 . [all data]

Piacente and Scardala, 1990
Piacente, Vincenzo; Scardala, Paolo, Vaporization enthalpies and entropies of some n-alkanes, Thermochimica Acta, 1990, 159, 193-200, https://doi.org/10.1016/0040-6031(90)80108-B . [all data]

Chirico, Nguyen, et al., 1989
Chirico, R.D.; Nguyen, A.; Steele, W.V.; Strube, M.M., Vapor pressure of n-alkanes revisited. New high-precision vapor pressure data on n-decane, n-eicosane, and n-octacosane, J. Chem. Eng. Data, 1989, 34, 149-156. [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Kudchadker and Zwolinski, 1966
Kudchadker, A.P.; Zwolinski, B.J., Vapor Pressure and Boiling Points of Normal Alkanes, C ₂₁ to C ₁₀₀ ., J. Chem. Eng. Data, 1966, 11, 2, 253-255, https://doi.org/10.1021/je60029a039 . [all data]

Hafsaoui and Mahmoud, 2007
Hafsaoui, S.L.; Mahmoud, R., Solid-liquid equilibria of binary systems containing n-tetracosane with naphthalene or dibenzofuran, J Therm Anal Calorim, 2007, 88, 2, 565-570, https://doi.org/10.1007/s10973-006-8084-2 . [all data]

Mondieig, Rajabalee, et al., 2004
Mondieig, D.; Rajabalee, F.; Metivaud, V.; Oonk, H.A.J.; Cuevas-Diarte, M.A., n -Alkane Binary Molecular Alloys, Chem. Mater., 2004, 16, 5, 786-798, https://doi.org/10.1021/cm031169p . [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]

Claudy and Letoffe, 1991
Claudy, P.; Letoffe, J.M., Phase transitions in even n-alkanes CnH2n+2, n = 16-28. Characterization by differential calorimetric analysis and by thermooptical analysis. Effect of deuteration, Calorim. Anal. Therm., 1991, 22, 281-290. [all data]

Domanska and Wyrzykowska-Stankiewicz, 1991, 2
Domanska, U.; Wyrzykowska-Stankiewicz, D., Enthalpies of fusion and solid-solid transition of even-numbered paraffins docosane, hexacosane, octacosane and tetracosane, Thermochim. Acta, 1991, 179, 265-271. [all data]

Company, 1973
Company, J.C., Measurement and interpretation of crystallization equilibriums of heavy paraffin and aromatic hydrocarbon solutions, Chem. Eng. Sci., 1973, 28, 318-323. [all data]

Schaerer, Busso, et al., 1955
Schaerer, A.A.; Busso, C.J.; Smith, A.E.; Skinner, L.B., Properties of pure normal alkanes in the C₁₇ to C₃₆ range, J. Am. Chem. Soc., 1955, 77, 2017-2019. [all data]

Notes

Go To: Top, Condensed phase thermochemistry data, Phase change data, References

• Symbols used in this document:
  

  Cp,liquid	Constant pressure heat capacity of liquid
  Tboil	Boiling point
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  ΔHtrs	Enthalpy of phase transition
  ΔStrs	Entropy of phase transition
  ΔfusH	Enthalpy of fusion
  ΔfusS	Entropy of fusion
  ΔsubH	Enthalpy of sublimation
  ΔsubH°	Enthalpy of sublimation at standard conditions
  ΔvapH	Enthalpy of vaporization
  ΔvapH°	Enthalpy of vaporization at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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