Dimethyl Sulfoxide

• Formula: C₂H₆OS
• Molecular weight: 78.133
• IUPAC Standard InChI: InChI=1S/C2H6OS/c1-4(2)3/h1-2H3 Copy

  
• IUPAC Standard InChIKey: IAZDPXIOMUYVGZ-UHFFFAOYSA-N Copy
• CAS Registry Number: 67-68-5
• 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.
• Isotopologues:
  • Dimethylsulfoxide-D6
• Other names: DMSO; Methane, sulfinylbis-; Methyl sulfoxide; Demsodrox; Dimexide; Dipirartril-tropico; Dolicur; Dromisol; Durasorb; DMS 70; DMS 90; Hyadur; Infiltrina; Somipront; Sulfinylbismethane; SQ 9453; Dimethyl sulphoxide; (CH3)2SO; A 10846; Deltan; Demasorb; Demavet; Demeso; Dermasorb; Doligur; Domoso; Gamasol 90; M 176; Methylsulfinylmethane; Rimso 50; Syntexan; NSC-763; Topsym; Dimethyl sulfur oxide; Herpid; Kemsol; Sclerosol; Sulfoxide, dimethyl; Methane, 1,1'-sulfinylbis-; DMSO (methyl sulfoxide); Sulphinylbis methane
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• Information on this page:
  • Phase change data
  • IR Spectrum
  • Mass spectrum (electron ionization)
  • References
  • Notes
• Other data available:
  • Gas phase thermochemistry data
  • Condensed phase thermochemistry data
  • Reaction thermochemistry data
  • Henry's Law data
  • Gas phase ion energetics data
  • Ion clustering data
  • Gas Chromatography
• Data at other public NIST sites:
  • Gas Phase Kinetics Database
  • X-ray Photoelectron Spectroscopy Database, version 5.0
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Phase change data

Go To: Top, IR Spectrum, Mass spectrum (electron ionization), References, Notes

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
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy 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

IR Spectrum

Go To: Top, Phase change data, Mass spectrum (electron ionization), References, Notes

Data compiled by: Coblentz Society, Inc.

• LIQUID (NEAT); BECKMAN IR-7 (GRATING); DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 4 cm^-1 resolution
• LIQUID (NEAT); PERKIN-ELMER 180; DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 4 cm^-1 resolution
• SOLUTION (10% IN CCl4 FOR 4000-1330 CM^-1, 10% IN CS2 FOR 1330-600 CM^-1); BECKMAN IR-7 (GRATING); DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 4 cm^-1 resolution
• SOLUTION (10.75% IN CCl4 FOR 3800-1300, 2.24% IN CS2 FOR 1300-620, AND 10.75% IN CCl4 FOR 620-250 CM^-1) VERSUS SOLVENT; Not specified, most likely a grating or hybrid spectrometer.; DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 4 cm^-1 resolution

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

• gas

Mass spectrum (electron ionization)

Go To: Top, Phase change data, IR Spectrum, References, Notes

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

References

Go To: Top, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Notes

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

Lindberg and Stenholm, 1966
Lindberg, J.J.; Stenholm, V., Viscosities, Densities, and Related Properties of Binary Mixtures Containing Dimethyl Sulphoxide and Mono-Subst. Benzenes or Guaiacol, Suom. Kemistiseuran Tied., 1966, 75, 22. [all data]

Douglas, 1948
Douglas, T.B., Vapor Pressure of Methyl Sulfoxide from 20 to 50 deg. Calculation of the Heat of Vaporization, J. Am. Chem. Soc., 1948, 70, 2001. [all data]

Douglas, 1946
Douglas, T.B., Heats of Formation of Liquid Methyl Sulfoxide and Crystalline Methyl Sulfone at 18 deg., J. Am. Chem. Soc., 1946, 68, 1072. [all data]

Clever and Westrum, 1970
Clever, H.L.; Westrum, E.F., Dimethyl sulfoxide and dimethyl sulfone. Heat capacities, enthalpies of fusion, and thermodynamic properties., J. Phys. Chem., 1970, 74, 1309. [all data]

Douglas, 1948, 2
Douglas, T.B., Vapor pressure of methyl sulfoxide from 20 to 50°. Calculation of the heat of vaporization, J. Am. Chem. Soc., 1948, 70, 2001-20. [all data]

Douglas, 1948, 3
Douglas, Thomas B., Vapor Pressure of Methyl Sulfoxide from 20 to 50°. Calculation of the Heat of Vaporization, J. Am. Chem. Soc., 1948, 70, 6, 2001-2002, https://doi.org/10.1021/ja01186a005 . [all data]

Al-Najjar and Al-Sammerrai, 2007
Al-Najjar, Hazim; Al-Sammerrai, Dhoaib, Thermogravimetric determination of the heat of vaporization of some highly polar solvents, J. Chem. Technol. Biotechnol., 2007, 37, 3, 145-152, https://doi.org/10.1002/jctb.280370302 . [all data]

Dykyj, Svoboda, et al., 1999
Dykyj, J.; Svoboda, J.; Wilhoit, R.C.; Frenkel, M.L.; Hall, K.R., Vapor Pressure of Chemicals: Part A. Vapor Pressure and Antoine Constants for Hydrocarbons and Sulfur, Selenium, Tellurium and Hydrogen Containing Organic Compounds, Springer, Berlin, 1999, 373. [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]

Sassa, Konishi, et al., 1974
Sassa, Yoshimasa; Konishi, Ryoichi; Katayama, Takashi, Isothermal vapor-liquid equilibrium data of DMSO [dimethyl sulfoxide] solutions by total pressure method. DMSO-acetone, DMSO-tetrahydrofuran, and DMSO-ethyl acetate systems, J. Chem. Eng. Data, 1974, 19, 1, 44-48, https://doi.org/10.1021/je60060a004 . [all data]

Jakli and Alexander Van Hook, 1972
Jakli, Gyorgy; Alexander Van Hook, W., The vapor pressures of dimethyl sulfoxide and hexadeuterodimethyl sulfoxide from about 313 to 453 K, The Journal of Chemical Thermodynamics, 1972, 4, 6, 857-864, https://doi.org/10.1016/0021-9614(72)90007-9 . [all data]

Boublik, Fried, et al., 1984
Boublik, T.; Fried, V.; Hala, E., The Vapour Pressures of Pure Substances: Selected Values of the Temperature Dependence of the Vapour Pressures of Some Pure Substances in the Normal and Low Pressure Region, 2nd ed., Elsevier, New York, 1984, 972. [all data]

NISHIMURA, NAKAYAMA, et al., 1972
NISHIMURA, MICHIKO; NAKAYAMA, MUTSUO; YANO, TAKEO, VAPOR PRESSURE OF PURE DMSO AND VAPOR-LIQUID EQUILIBRIA IN DMSO-H2O SYSTEM UNDER ISOBARIC CONDITIONS, J. Chem. Eng. Japan / JCEJ, 1972, 5, 3, 223-226, https://doi.org/10.1252/jcej.5.223 . [all data]

Meszaros, 1969
Meszaros, S., Period. Polytech., Chem. Eng., 1969, 13, 1-2, 79. [all data]

Jakli and van Hook, 1972
Jakli, G.; van Hook, W.A., The Vapor Pressures of Dimethyl Sulfoxide and Hexadeuterodimethyl Sulfoxide from about 313 to 453 K, J. Chem. Thermodyn., 1972, 4, 6, 857-864, https://doi.org/10.1016/0021-9614(72)90007-9 . [all data]

Clever and Westrum, 1970, 2
Clever, H.L.; Westrum, E.F., Jr., Dimethylsulfoxide and dimethylsulfone. Heat capacities, enthalpies of fusion, and thermodynamic properties, J. Phys. Chem., 1970, 74, 1309-1317. [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]

Notes

Go To: Top, Phase change data, IR Spectrum, Mass spectrum (electron ionization), References

• Symbols used in this document:
  

  Tboil	Boiling point
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  ΔfusH	Enthalpy of fusion
  ΔfusS	Entropy of fusion
  ΔvapH	Enthalpy of vaporization
  ΔvapH°	Enthalpy of vaporization at standard conditions

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