Hydrazine

• Formula: H₄N₂
• Molecular weight: 32.0452
• IUPAC Standard InChI: InChI=1S/H4N2/c1-2/h1-2H2 Copy

  
• IUPAC Standard InChIKey: OAKJQQAXSVQMHS-UHFFFAOYSA-N Copy
• CAS Registry Number: 302-01-2
• 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: Levoxine; N2H4; Diamine; Hydrazyna; Rcra waste number U133; Hydrazine, anhydrous; Hydrazine base; Nitrogen hydride, (N2H4); Oxytreat 35
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• Information on this page:
  • Phase change data
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • Mass spectrum (electron ionization)
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
  • X-ray Photoelectron Spectroscopy Database, version 5.0
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• NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

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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:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos

Enthalpy of vaporization

Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
    P = vapor pressure (atm)
    T = temperature (K)

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References

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

Tipton, Stone, et al., 1989
Tipton, T.; Stone, D.A.; KuBulat, K.; Person, W.B., Experimental and theoretical studies of the infrared spectra of hydrazines: N2H4, N2H3D, N2H2D2, N2HD3, and N2D4, J. Phys. Chem., 1989, 93, 2917. [all data]

Ferren, Miller, et al., 1957
Ferren, R.A.; Miller, J.G.; Day, A.R., J. Am. Chem. Soc., 1957, 79, 70. [all data]

Burtle, 1952
Burtle, J.G., Vapor Pressure-Composition Measurement son Aqueous Hydrazine Solutions, Ind. Eng. Chem., 1952, 44, 1675. [all data]

McMillan, 1967
McMillan, J.A., Hydrazine-1,1-Dimethylhydrazine Solid-Liquid Phase Diagram, J. Chem. Eng. Data, 1967, 12, 39. [all data]

Lempe, Neuhaeuser, et al., 1966
Lempe, D.; Neuhaeuser, S.; Maeder, H.J.; Bittrich, H.-J., Equilibriums in Ternary Liquid-Liquid Systems; Triethylamine + Water and Monoethylamine, Diethylamine, and Hydrazine, Wiss. Z. Tech. Hochsch. Chem. "Carl Schorlemmer" Leuna-Me- rseburg, 1966, 8, 158. [all data]

Bruhl, 1897
Bruhl, J.W., Spectrochemistry of nitrogen containing compounds V, Z. Phys. Chem., Stoechiom. Verwandtschaftsl., 1897, 22, 373. [all data]

Scott, Oliver, et al., 1949
Scott, D.W.; Oliver, G.D.; Gross, M.E.; Hubbard, W.N.; Huffman, H.M., Hydrazine: Heat Capacity, Heats of Fusion and Vaporization, Vapor Pressure, Entropy and Thermodynamic Functions, J. Am. Chem. Soc., 1949, 71, 2293-7. [all data]

Scott, Oliver, et al., 1949, 2
Scott, D.W.; Oliver, G.D.; Gross, Margaret E.; Hubbard, W.N.; Huffman, Hugh M., Hydrazine: Heat Capacity, Heats of Fusion and Vaporization, Vapor Pressure, Entropy and Thermodynamic Functions, J. Am. Chem. Soc., 1949, 71, 7, 2293-2297, https://doi.org/10.1021/ja01175a007 . [all data]

Notes

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• Symbols used in this document:
  

  Tboil	Boiling point
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  ΔvapH	Enthalpy of vaporization

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