Methanesulfonic acid

• Formula: CH₄O₃S
• Molecular weight: 96.106
• IUPAC Standard InChI: InChI=1S/CH4O3S/c1-5(2,3)4/h1H3,(H,2,3,4) Copy

  
• IUPAC Standard InChIKey: AFVFQIVMOAPDHO-UHFFFAOYSA-N Copy
• CAS Registry Number: 75-75-2
• Chemical structure:
  This structure is also available as a 2d Mol file
• Other names: Methanesulphonic acid; Methylsulfonic acid; Kyselina methansulfonova; CH3SO3H; NSC 3718
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• Information on this page:
  • Gas phase ion energetics data
  • References
  • Notes
• Other data available:
  • Phase change data
  • Reaction thermochemistry data
  • Henry's Law data
  • Mass spectrum (electron ionization)
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
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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

Data compiled as indicated in comments:
B - John E. Bartmess

De-protonation reactions

CH₃O₃S^- +  =

By formula: CH₃O₃S^- + H⁺ = CH₄O₃S

References

Go To: Top, Gas phase ion energetics data, Notes

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

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]

Koppel, Taft, et al., 1994
Koppel, I.A.; Taft, R.W.; Anvia, F.; Zhu, S.Z.; Hu, L.Q.; Sung, K.S.; Desmarteau, D.D.; Yagupolskii, L.M., The Gas-Phase Acidities of Very Strong Neutral Bronsted Acids, J. Am. Chem. Soc., 1994, 116, 7, 3047, https://doi.org/10.1021/ja00086a038 . [all data]

Taft, Koppel, et al., 1990
Taft, R.W.; Koppel, I.J.; Topsom, R.D.; Anvia, F., Acidities of OH Compounds, including Alcohols, Phenols, Carboxylic Acids, and Mineral Acids, J. Am. Chem. Soc., 1990, 112, 6, 2047, https://doi.org/10.1021/ja00162a001 . [all data]

Notes

Go To: Top, Gas phase ion energetics data, References

• Symbols used in this document:
  

  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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