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:
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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:
  • Phase change data
  • Mass spectrum (electron ionization)
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • UV/Visible spectrum
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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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

Mass spectrum (electron ionization)

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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 by: NIST Mass Spectrometry Data Center, William E. Wallace, director

Spectrum

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Additional Data

References

Go To: Top, Phase change data, Mass spectrum (electron ionization), Notes

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

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, Phase change data, Mass spectrum (electron ionization), References

• Symbols used in this document:
  

  Ttrs	Temperature of phase transition
  ΔHtrs	Enthalpy of phase transition
  ΔfusH	Enthalpy of fusion
  ΔsubH	Enthalpy of sublimation

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