Hydrogen peroxide

• Formula: H₂O₂
• Molecular weight: 34.0147
• IUPAC Standard InChI: InChI=1S/H2O2/c1-2/h1-2H Copy

  
• IUPAC Standard InChIKey: MHAJPDPJQMAIIY-UHFFFAOYSA-N Copy
• CAS Registry Number: 7722-84-1
• Chemical structure:
  This structure is also available as a 2d Mol file
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Reaction thermochemistry data
  • Gas phase ion energetics data
  • Ion clustering data
  • IR Spectrum
  • References
  • Notes
• Other data available:
  • Phase change data
  • Henry's Law data
  • Vibrational and/or electronic energy levels
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
• Options:
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Gas 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.

Gas 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 (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Reaction 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 by: John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

HO₂^- +  =

By formula: HO₂^- + H⁺ = H₂O₂

 +  = ( • )

By formula: NO₃^- + H₂O₂ = (NO₃^- • H₂O₂)

 +  = ( • )

By formula: NO₂^- + H₂O₂ = (NO₂^- • H₂O₂)

 +  = ( • )

By formula: Cl^- + H₂O₂ = (Cl^- • H₂O₂)

HO₄S^- +  = (HO₄S^- • )

By formula: HO₄S^- + H₂O₂ = (HO₄S^- • H₂O₂)

Gas phase ion energetics 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 evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Ionization energy determinations

Appearance energy determinations

De-protonation reactions

HO₂^- +  =

By formula: HO₂^- + H⁺ = H₂O₂

Ion clustering 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 by: John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

 +  = ( • )

By formula: Cl^- + H₂O₂ = (Cl^- • H₂O₂)

HO₄S^- +  = (HO₄S^- • )

By formula: HO₄S^- + H₂O₂ = (HO₄S^- • H₂O₂)

 +  = ( • )

By formula: NO₂^- + H₂O₂ = (NO₂^- • H₂O₂)

 +  = ( • )

By formula: NO₃^- + H₂O₂ = (NO₃^- • H₂O₂)

IR Spectrum

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Data compiled by: Tanya L. Myers, Russell G. Tonkyn, Ashley M. Oeck, Tyler O. Danby, John S. Loring, Matthew S. Taubman, Stephen W. Sharpe, Jerome C. Birnbaum, and Timothy J. Johnson

• liquid; Bruker Tensor 37 FTIR
  0.48207762, 0.48211176, 0.71088936 cm^-1 resolution

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, 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]

Ramond, Blanksby, et al., 2002
Ramond, T.M.; Blanksby, S.J.; Kato, S.; Bierbaum, V.M.; Davico, G.E.; Schwartz, R.L.; Lineberger, W.C.; Elliso, Heat of formation of the hydroperoxyl radical HOO via negative ion studies, J. Phys. Chem. A, 2002, 106, 42, 9641-9647, https://doi.org/10.1021/jp014614h . [all data]

Bierbaum, Schmidt, et al., 1981
Bierbaum, V.M.; Schmidt, R.J.; DePuy, C.H.; Mead, R.H.; Schulz, P.A.; Lineberger, W.C., Reactions of carbanions with triplet and singlet molecular oxygen, J. Am. Chem. Soc., 1981, 103, 6262. [all data]

Bohringer, Fahey, et al., 1984
Bohringer, H.; Fahey, D.W.; Fehsenfeld, F.C.; Ferguson, E.E., Bond energies of the molecules H₂O, SO₂, H₂O₂, and HCl to various atmospheric negative ions, J. Chem. Phys., 1984, 81, 2805. [all data]

Keesee, Lee, et al., 1980
Keesee, R.G.; Lee, N.; Castleman, A.W., Jr., Properties of clusters in the gas phase: V. Complexes of neutral molecules onto negative ions, J. Chem. Phys., 1980, 73, 2195. [all data]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Ashmore and Burgess, 1977
Ashmore, F.S.; Burgess, A.R., Study of Some Medium Size Alcohols and Hydroperoxides by Photoelectron Spectroscopy, J. Chem. Soc. Faraday Trans. 2, 1977, 73, 1247. [all data]

Brown, 1975
Brown, R.S., A photoelectron investigation of the peroxide bond, Can. J. Chem., 1975, 53, 3439. [all data]

Foner and Hudson, 1962
Foner, S.N.; Hudson, R.L., Ionization and dissociation of hydrogen peroxide by electron impact, J. Chem. Phys., 1962, 36, 2676. [all data]

Lindeman and Guffy, 1958
Lindeman, L.P.; Guffy, J.C., Determination of the O-O bond energy in hydrogen peroxide by electron impact, J. Chem. Phys., 1958, 29, 247. [all data]

Osafune and Kimura, 1974
Osafune, K.; Kimura, K., Photoelectron spectroscopic study of hydrogen peroxide, Chem. Phys. Lett., 1974, 25, 47. [all data]

Foner and Hudson, 1962, 2
Foner, S.N.; Hudson, R.L., Mass spectrometry of the HO₂ free radical, J. Chem. Phys., 1962, 36, 2681. [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, References

• Symbols used in this document:
  

  AE	Appearance energy
  IE (evaluated)	Recommended ionization energy
  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions

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