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:
  • Condensed phase thermochemistry data
  • Phase change data
  • References
  • Notes
• Other data available:
  • Gas 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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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.

Liquid Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
    C_p = heat capacity (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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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

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.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

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

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

• Symbols used in this document:
  

  S°liquid,1 bar	Entropy of liquid at standard conditions (1 bar)
  Tboil	Boiling point
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  ΔfH°liquid	Enthalpy of formation of liquid at standard conditions
  ΔvapH	Enthalpy of vaporization

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