Cyclotetramethylenetetranitramine

• Formula: C₄H₈N₈O₈
• Molecular weight: 296.1551
• IUPAC Standard InChI: InChI=1S/C4H8N8O8/c13-9(14)5-1-6(10(15)16)3-8(12(19)20)4-7(2-5)11(17)18/h1-4H2 Copy

  
• IUPAC Standard InChIKey: UZGLIIJVICEWHF-UHFFFAOYSA-N Copy
• CAS Registry Number: 2691-41-0
• Chemical structure:
  This structure is also available as a 2d Mol file or as a computed 3d SD file
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• Other names: Octogen; 1,3,5,7-Tetrazocine, octahydro-1,3,5,7-tetranitro-; HMX; Octahydro-1,3,5,7-Tetranitro-s-tetrazocine; Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine; Oktogen; Tetramethylenetetranitramine; 1,3,5,7-Tetranitro-1,3,5,7-tetraazacyclooctane; 1,3,5,7-Tetraza-1,3,5,7-tetranitrocyclooctane; β Hmy; HW 4; LX 14-0; Octagen
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• Information on this page:
  • Condensed phase thermochemistry data
  • Phase change data
  • References
  • Notes
• Other data available:
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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Condensed phase thermochemistry data

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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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DH - Eugene S. Domalski and Elizabeth D. Hearing

Constant pressure heat capacity of solid

Phase change data

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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:
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy of sublimation

Enthalpy of fusion

Temperature of phase transition

Enthalpy 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.

Ornellas, 1974
Ornellas, D.L., The heat and products of detonation in a calorimeter of CNO, HNO, CHNF, CHNO, CHNOF, and CHNOSi explosives, Combust. Flame, 1974, 23, 37-46. [all data]

Krien, Licht, et al., 1973
Krien, G.; Licht, H.H.; Zierath, J., Thermochemical investigation of nitramines, Thermochim. Acta, 1973, 6, 465-472. [all data]

Handrick, 1956
Handrick, G.R., Report of the study of pure explosive compounds. Part IV. Calculation of heat of combustion of organic compounds from structural features and calculation of power of high explosives, Rpt. C-58247 for the Office of the Chief of Ordnance, contract DA-19-020-ORD-47 by the Arthur D. Little, Inc., Cambridge, MA, 1956, 467-573. [all data]

Yin, Ziru, et al., 1991
Yin, C.; Ziru, L.; Ganghe, W.; Chengyun, W., et al., Determination of heat capacity of explosives and related materials by DSC, Proc. Int. Pyrotech. Semin. 17th(Vol. 1), 1991, 515-521. [all data]

Taylor and Crookes, 1976
Taylor, John Watson; Crookes, Roy J., Vapour pressure and enthalpy of sublimation of 1,3,5,7-tetranitro-1,3,5,7-tetra-azacyclo-octane (HMX), J. Chem. Soc., Faraday Trans. 1, 1976, 72, 0, 723, https://doi.org/10.1039/f19767200723 . [all data]

Maksimov, 1992
Maksimov, Yu.Ya., Boiling point and enthalpy of evaporation of liquid hexogen and octogen, Zhur. Fiz. Khim., 1992, 66(2), 540-542. [all data]

Hall, 1971
Hall, P.G., Thermal decomposition and phase transitions in solid nitramines, Trans. Faraday Soc., 1971, 67(3), 556-562. [all data]

Notes

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

• Symbols used in this document:
  

  Cp,solid	Constant pressure heat capacity of solid
  Ttrs	Temperature of phase transition
  ΔHtrs	Enthalpy of phase transition
  ΔcH°solid	Enthalpy of combustion of solid at standard conditions
  ΔfH°solid	Enthalpy of formation of solid at standard conditions
  ΔfusH	Enthalpy of fusion
  ΔsubH	Enthalpy of sublimation

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