Methane, nitro-

• Formula: CH₃NO₂
• Molecular weight: 61.0400
• IUPAC Standard InChI: InChI=1S/CH3NO2/c1-2(3)4/h1H3 Copy

  
• IUPAC Standard InChIKey: LYGJENNIWJXYER-UHFFFAOYSA-N Copy
• CAS Registry Number: 75-52-5
• 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: Nitromethane; Nitrocarbol; CH3NO2; Nitrometan; UN 1261; NM; NSC 428
• Permanent link for this species. Use this link for bookmarking this species for future reference.
• Information on this page:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data
  • Henry's Law data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • UV/Visible spectrum
  • References
  • Notes
• Other data available:
  • Gas phase ion energetics data
  • Ion clustering data
  • Gas Chromatography
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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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.

Data compiled by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

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 liquid

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

Enthalpy of vaporization

Enthalpy of vaporization

Δ_vapH = A exp(-βT_r) (1 − T_r)^β
    Δ_vapH = Enthalpy of vaporization (at saturation pressure) (kJ/mol)
    T_r = reduced temperature (T / T_c)

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Entropy of vaporization

Antoine Equation Parameters

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

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Enthalpy of fusion

Entropy of fusion

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 as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias

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

CH₂NO₂^- +  =

By formula: CH₂NO₂^- + H⁺ = CH₃NO₂

 +  = ( • )

By formula: Cl^- + CH₃NO₂ = (Cl^- • CH₃NO₂)

( • ) +  = ( • 2)

By formula: (Cl^- • CH₃NO₂) + CH₃NO₂ = (Cl^- • 2CH₃NO₂)

 +  = ( • )

By formula: NO₂^- + CH₃NO₂ = (NO₂^- • CH₃NO₂)

C₆H₇N⁺ +  = (C₆H₇N⁺ • )

By formula: C₆H₇N⁺ + CH₃NO₂ = (C₆H₇N⁺ • CH₃NO₂)

Free energy of reaction

(CH₃NO₂^- • ) +  = (CH₃NO₂^- • 2)

By formula: (CH₃NO₂^- • CH₃NO₂) + CH₃NO₂ = (CH₃NO₂^- • 2CH₃NO₂)

CH₆N⁺ +  = (CH₆N⁺ • )

By formula: CH₆N⁺ + CH₃NO₂ = (CH₆N⁺ • CH₃NO₂)

Bond type: Hydrogen bonds of the type NH+-O between organics

CH₂NO₂^- +  = C₂H₅N₂O₄^-

By formula: CH₂NO₂^- + CH₃NO₂ = C₂H₅N₂O₄^-

C₃H₉N₃O₆^- + 3 = C₄H₁₂N₄O₈^-

By formula: C₃H₉N₃O₆^- + 3CH₃NO₂ = C₄H₁₂N₄O₈^-

C₂H₅N₂O₄^- + 2 = C₃H₈N₃O₆^-

By formula: C₂H₅N₂O₄^- + 2CH₃NO₂ = C₃H₈N₃O₆^-

C₃H₈N₃O₆^- + 3 = C₄H₁₁N₄O₈^-

By formula: C₃H₈N₃O₆^- + 3CH₃NO₂ = C₄H₁₁N₄O₈^-

C₄H₁₁N₄O₈^- + 4 = C₅H₁₄N₅O₁₀^-

By formula: C₄H₁₁N₄O₈^- + 4CH₃NO₂ = C₅H₁₄N₅O₁₀^-

C₂H₆N₂O₆^- + 2 = C₃H₉N₃O₈^-

By formula: C₂H₆N₂O₆^- + 2CH₃NO₂ = C₃H₉N₃O₈^-

C₄H₁₂N₄O₈^- + 4 = C₅H₁₅N₅O₁₀^-

By formula: C₄H₁₂N₄O₈^- + 4CH₃NO₂ = C₅H₁₅N₅O₁₀^-

C₃H₉N₃O₈^- + 3 = C₄H₁₂N₄O₁₀^-

By formula: C₃H₉N₃O₈^- + 3CH₃NO₂ = C₄H₁₂N₄O₁₀^-

CH₃N₂O₄^- + 2 = C₂H₆N₃O₆^-

By formula: CH₃N₂O₄^- + 2CH₃NO₂ = C₂H₆N₃O₆^-

C₂H₆ClN₂O₄^- + 3 = C₃H₉ClN₃O₆^-

By formula: C₂H₆ClN₂O₄^- + 3CH₃NO₂ = C₃H₉ClN₃O₆^-

C₁₁H₁₀⁺ +  = (C₁₁H₁₀⁺ • )

By formula: C₁₁H₁₀⁺ + CH₃NO₂ = (C₁₁H₁₀⁺ • CH₃NO₂)

C₂H₆N₃O₆^- + 3 = C₃H₉N₄O₈^-

By formula: C₂H₆N₃O₆^- + 3CH₃NO₂ = C₃H₉N₄O₈^-

C₃H₉N₄O₈^- + 4 = C₄H₁₂N₅O₁₀^-

By formula: C₃H₉N₄O₈^- + 4CH₃NO₂ = C₄H₁₂N₅O₁₀^-

C₅H₁₀NO₂⁺ +  = (C₅H₁₀NO₂⁺ • )

By formula: C₅H₁₀NO₂⁺ + CH₃NO₂ = (C₅H₁₀NO₂⁺ • CH₃NO₂)

C₅H₁₂NO₂⁺ +  = (C₅H₁₂NO₂⁺ • )

By formula: C₅H₁₂NO₂⁺ + CH₃NO₂ = (C₅H₁₂NO₂⁺ • CH₃NO₂)

C₃H₉ClN₃O₆^- + 4 = C₄H₁₂ClN₄O₈^-

By formula: C₃H₉ClN₃O₆^- + 4CH₃NO₂ = C₄H₁₂ClN₄O₈^-

C₄H₁₂N₄O₁₀^- + 4 = C₅H₁₅N₅O₁₂^-

By formula: C₄H₁₂N₄O₁₀^- + 4CH₃NO₂ = C₅H₁₅N₅O₁₂^-

 +  = ( • )

By formula: Li⁺ + CH₃NO₂ = (Li⁺ • CH₃NO₂)

CH₃NO₂^- +  = (CH₃NO₂^- • )

By formula: CH₃NO₂^- + CH₃NO₂ = (CH₃NO₂^- • CH₃NO₂)

 +  = CH₃BrNO₂^-

By formula: Br^- + CH₃NO₂ = CH₃BrNO₂^-

 +  = ( • )

By formula: I^- + CH₃NO₂ = (I^- • CH₃NO₂)

Henry's Law 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: Rolf Sander

Henry's Law constant (water solution)

k_H(T) = k°_H exp(d(ln(k_H))/d(1/T) ((1/T) - 1/(298.15 K)))
k°_H = Henry's law constant for solubility in water at 298.15 K (mol/(kg*bar))
d(ln(k_H))/d(1/T) = Temperature dependence constant (K)

IR Spectrum

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Data compiled by: Coblentz Society, Inc.

• GAS (20 mmHg, N2 ADDED, TOTAL PRESSURE 600 mmHg); DOW KBr FOREPRISM-GRATING; DIGITIZED BY COBLENTZ SOCIETY (BATCH II) FROM HARD COPY; 2 cm^-1 resolution

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

• gas

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

UV/Visible spectrum

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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: Victor Talrose, Eugeny B. Stern, Antonina A. Goncharova, Natalia A. Messineva, Natalia V. Trusova, Margarita V. Efimkina

Spectrum

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Additional Data

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, Notes

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

Knobel, Miroshnichenko, et al., 1971
Knobel, Y.K.; Miroshnichenko, E.A.; Lebedev, Y.A., Heats of combustion of nitromethane and dinitromethane: enthalpies of formation of nitromethyl radicals and energies of dissociation of bonds in nitro derivatives of methane, Bull. Acad. Sci. USSR, Div. Chem. Sci., 1971, 425-428. [all data]

Lebedeva and Ryadenko, 1973
Lebedeva, N.D.; Ryadenko, V.L.R., Enthalpies of formation of nitroalkanes, Russ. J. Phys. Chem. (Engl. Transl.), 1973, 47, 1382. [all data]

Cass, Fletcher, et al., 1958
Cass, R.C.; Fletcher, S.E.; Mortimer, C.T.; Quincey, P.G.; Springall, H.D., Heats of combustion and molecular structure. Part IV. Aliphatic nitroalkanes and nitric esters, J. Chem. Soc., 1958, 958-962. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds, Academic Press, New York, 1970, 1-636. [all data]

Holcomb and Dorsey, 1949
Holcomb, D.E.; Dorsey, C.L., Jr., Thermodynamic properties of nitroparaffins, Ind. Eng. Chem., 1949, 41, 2788-2792. [all data]

Swientoslawski, 1910
Swientoslawski, W., Thermochemische Untersuchungen der organischen Verbindungen. Dritte Mitteilung. Stickstoffhaltige Verbindungen., Z. Phys. Chem., 1910, 72, 49-83. [all data]

Jones and Giauque, 1947
Jones, W.M.; Giauque, W.F., The entropy of nitromethane. Heat capacity of solid and liquid. Vapor pressure, heats of fusion and vaporization, J. Am. Chem. Soc., 1947, 69, 983-987. [all data]

Berman and West, 1969
Berman, H.A.; West, E.D., Heat capacity of liquid nitromethane from 35 to 200°C, J. Chem. Eng. Data, 1969, 14, 107-109. [all data]

Hough, Mason, et al., 1950
Hough, E.W.; Mason, D.M.; Sage, B.H., Heat capacities of several organic liquids, J. Am. Chem. Soc., 1950, 72, 5775-5777. [all data]

Williams, 1925
Williams, J.W., A study of the physical properties of nitromethane, J. Am. Chem. Soc., 1925, 47, 2644-2652. [all data]

Toops, 1956
Toops, E.E., Physical Properties of High Purity Nitroparaffins, J. Phys. Chem., 1956, 60, 304-6. [all data]

Timmermans, 1952
Timmermans, J., Freezing points of organic compounds. VVI New determinations., Bull. Soc. Chim. Belg., 1952, 61, 393. [all data]

Dreisbach and Martin, 1949
Dreisbach, R.R.; Martin, R.A., Physical Data on Some Organic Compounds, Ind. Eng. Chem., 1949, 41, 2875-8. [all data]

Joukovsky, 1934
Joukovsky, N.I., Experimental Study of the Theory of Concentrated Solutions. XI. Thermodynamic Properties of Concentrated Solutions of Aliphatic Organic Compounds Containing Nitrogen., Bull. Soc. Chim. Belg., 1934, 43, 397. [all data]

Timmermans, 1921
Timmermans, J., The Freezing Points of Organic Substances IV. New Exp. Determinations, Bull. Soc. Chim. Belg., 1921, 30, 62. [all data]

Jones and Giauque, 1947, 2
Jones, W.M.; Giauque, W.F., The Entropy of Nitromethane. Heat Capacity of Solid and Liquid. Vapor Pressure, Heats of Fusion and Vaporizaion, J. Am. Chem. Soc., 1947, 69, 983-7. [all data]

Majer and Svoboda, 1985
Majer, V.; Svoboda, V., Enthalpies of Vaporization of Organic Compounds: A Critical Review and Data Compilation, Blackwell Scientific Publications, Oxford, 1985, 300. [all data]

Griffin, 1949
Griffin, D.N., The Critical Point of Nitromethane., J. Am. Chem. Soc., 1949, 71, 1423. [all data]

Ambrose, Counsell, et al., 1978
Ambrose, D.; Counsell, J.F.; Hicks, C.P., The correlation and estimation of vapour pressures: II a new procedure for estimation and extrapolation, J. Chem. Thermodyn., 1978, 10, 771. [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

Berman and West, 1967
Berman, Horace A.; West, Estal Dale, Density and vapor pressure of nitromethane 26.degree. to 200.degree., J. Chem. Eng. Data, 1967, 12, 2, 197-199, https://doi.org/10.1021/je60033a011 . [all data]

McCullough, Scott, et al., 1954
McCullough, J.P.; Scott, D.W.; Pennington, R.E.; Hossenlopp, I.A.; Waddington, Guy, Nitromethane: The Vapor Heat Capacity, Heat of Vaporization, Vapor Pressure and Gas Imperfection; the Chemical Thermodynamic Properties from 0 to 1500°K., J. Am. Chem. Soc., 1954, 76, 19, 4791-4796, https://doi.org/10.1021/ja01648a008 . [all data]

Domalski and Hearing, 1996
Domalski, Eugene S.; Hearing, Elizabeth D., Heat Capacities and Entropies of Organic Compounds in the Condensed Phase. Volume III, J. Phys. Chem. Ref. Data, 1996, 25, 1, 1, https://doi.org/10.1063/1.555985 . [all data]

Metz, Cyr, et al., 1991
Metz, R.B.; Cyr, D.R.; Neumark, D.M., Study of the 2B1 and 2A2 States of CH2NO2 via Ultraviolet Photoelectron Spectroscopy of the CH2NO2- Anion, J. Phys. Chem., 1991, 95, 7, 2900, https://doi.org/10.1021/j100160a047 . [all data]

Bartmess, Scott, et al., 1979
Bartmess, J.E.; Scott, J.A.; McIver, R.T., Jr., The gas phase acidity scale from methanol to phenol, J. Am. Chem. Soc., 1979, 101, 6047. [all data]

Cumming and Kebarle, 1978
Cumming, J.B.; Kebarle, P., Summary of gas phase measurements involving acids AH. Entropy changes in proton transfer reactions involving negative ions. Bond dissociation energies D(A-H) and electron affinities EA(A), Can. J. Chem., 1978, 56, 1. [all data]

MacKay and Bohme, 1978
MacKay, G.I.; Bohme, D.K., Proton-Transfer Reactions in Nitromethane at 297K, Int. J. Mass Spectrom. Ion Phys., 1978, 26, 4, 327, https://doi.org/10.1016/0020-7381(78)80052-7 . [all data]

Wincel, 2003
Wincel, H., Gas-phase Solvation of Cl-, NO2-, CH2NO2-, CH3NO2-, and CH3NO4- by CH3NO2, Int. J. Mass Spectrom., 2003, 226, 3, 341-353, https://doi.org/10.1016/S1387-3806(03)00066-6 . [all data]

Sieck, 1985
Sieck, L.W., Thermochemistry of Solvation of NO₂^- and C₆H₅NO₂^- by Polar Molecules in the Vapor Phase. Comparison with Cl^- and Variation with Ligand Structure., J. Phys. Chem., 1985, 89, 25, 5552, https://doi.org/10.1021/j100271a049 . [all data]

Riveros, Breda, et al., 1973
Riveros, J.M.; Breda, A.C.; Blair, L.K., Formation and relative stability of chloride ion clusters in the gas phase by ICR spectroscopy, J. Am. Chem. Soc., 1973, 95, 4066. [all data]

Larson and McMahon, 1984
Larson, J.W.; McMahon, T.B., Fluoride and chloride affinities of main group oxides, fluorides, oxofluorides, and alkyls. Quantitative scales of lewis acidities from ion cyclotron resonance halide-exchange equilibria, J. Phys. Chem., 1984, 88, 1083. [all data]

Meot-Ner (Mautner) and El-Shall, 1986
Meot-Ner (Mautner), M.; El-Shall, M.S., Ionic Charge Transfer Complexes. 1. Cationic Complexes with Delocalized and Partially Localized pi Systems, J. Am. Chem. Soc., 1986, 108, 15, 4386, https://doi.org/10.1021/ja00275a026 . [all data]

Compton, Carman Jr., et al., 1996
Compton, R.N.; Carman Jr.; Desfrancois, C.; Abdoul-Carmine, H.; Schermann, J.P.; Hendricks, J.H., On the binding of Electrons to Nitromethane: Dipole and Valence Bound Anions, J. Chem. Phys., 1996, 105, 9, 3472, https://doi.org/10.1063/1.472993 . [all data]

Meot-Ner, 1984
Meot-Ner, (Mautner)M., The Ionic Hydrogen Bond and Ion Solvation. 1. -NH+ O-, -NH+ N- and -OH+ O- Bonds. Correlations with Proton Affinity. Deviations Due to Structural Effects, J. Am. Chem. Soc., 1984, 106, 5, 1257, https://doi.org/10.1021/ja00317a015 . [all data]

El-Shall and Meot-Ner (Mautner), 1987
El-Shall, M.S.; Meot-Ner (Mautner), M., Ionic Charge Transfer Complexes. 3. Delocalised pi Systems as Electron Acceptors and Donors, J. Phys. Chem., 1987, 91, 5, 1088, https://doi.org/10.1021/j100289a017 . [all data]

Meot-Ner and Field, 1974
Meot-Ner, (Mautner); Field, F.H., Solvation and Association of Protonated Gaseous Amino Acids, J. Am. Chem. Soc., 1974, 96, 10, 3168, https://doi.org/10.1021/ja00817a024 . [all data]

Staley and Beauchamp, 1975
Staley, R.H.; Beauchamp, J.L., Intrinsic Acid - Base Properties of Molecules. Binding Energies of Li+ to pi - and n - Donor Bases, J. Am. Chem. Soc., 1975, 97, 20, 5920, https://doi.org/10.1021/ja00853a050 . [all data]

Dzidic and Kebarle, 1970
Dzidic, I.; Kebarle, P., Hydration of the Alkali Ions in the Gas Phase. Enthalpies and Entropies of Reactions M+(H2O)n-1 + H2O = M+(H2O)n, J. Phys. Chem., 1970, 74, 7, 1466, https://doi.org/10.1021/j100702a013 . [all data]

Tanabe, Morgon, et al., 1996
Tanabe, F.K.J.; Morgon, N.H.; Riveros, J.M., Relative Bromide and Iodide Affinity of Simple Solvent Molecules Determined by FT-ICR, J. Phys. Chem., 1996, 100, 8, 2862-2866, https://doi.org/10.1021/jp952290p . [all data]

Hiraoka, Mizure, et al., 1988
Hiraoka, K.; Mizure, S.; Yamabe, S.; Nakatsuji, Y., Gas Phase Clustering Reactions of CN^- and CH₂CN^- with MeCN, Chem. Phys. Lett., 1988, 148, 6, 497, https://doi.org/10.1016/0009-2614(88)80320-8 . [all data]

Caldwell, Masucci, et al., 1989
Caldwell, G.W.; Masucci, J.A.; Ikonomou, M.G., Negative Ion Chemical Ionization Mass Spectrometry - Binding of Molecules to Bromide and Iodide Anions, Org. Mass Spectrom., 1989, 24, 1, 8, https://doi.org/10.1002/oms.1210240103 . [all data]

Grammaticakis, 1950
Grammaticakis, P., Contribution a l'etude de l'absorption dans l'ultraviolet moyen des anilines ortho-substituees. III. Orthonitro- et orthocarboxy- anilines N-substituees, Bull. Soc. Chim. Fr., 1950, 17, 158-166. [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Henry's Law data, IR Spectrum, Mass spectrum (electron ionization), UV/Visible spectrum, References

• Symbols used in this document:
  

  Cp,liquid	Constant pressure heat capacity of liquid
  Pc	Critical pressure
  S°liquid	Entropy of liquid at standard conditions
  T	Temperature
  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  d(ln(kH))/d(1/T)	Temperature dependence parameter for Henry's Law constant
  k°H	Henry's Law constant at 298.15K
  ΔcH°liquid	Enthalpy of combustion of liquid at standard conditions
  ΔfH°gas	Enthalpy of formation of gas at standard conditions
  ΔfH°liquid	Enthalpy of formation of liquid at standard conditions
  ΔfusH	Enthalpy of fusion
  ΔfusS	Entropy of fusion
  ΔrG°	Free energy of reaction at standard conditions
  ΔrH°	Enthalpy of reaction at standard conditions
  ΔrS°	Entropy of reaction at standard conditions
  ΔvapH	Enthalpy of vaporization
  ΔvapH°	Enthalpy of vaporization at standard conditions
  ΔvapS	Entropy of vaporization
  ρc	Critical density

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