- Dimethyl sulfoxide (data page)
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This page provides supplementary chemical data on dimethyl sulfoxide.
Contents
Material Safety Data Sheet
The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source such as SIRI, and follow its directions. MSDS is available at Mallinckrodt Baker.
Structure and properties
Structure and properties Index of refraction[1], nD 1.4795 at 20°C
1.4787 at 21°CAbbe number ? Dielectric constant,[2] εr 48 ε0 at 20 °C Bond strength ? Bond length ? Bond angle ? Magnetic susceptibility ? Surface tension[2] 43 dyn/cm at 20°C Viscosity 2.14 mPa·s[2] at 20°C
1.1 mP·s[1] at 27°CThermodynamic properties
Phase behavior Triple point 291.67 K (18.52 °C), ? Pa Critical point[2] 720 K (447 °C), 5630 kPa Std enthalpy change
of fusion, ΔfusHo14.37 kJ/mol Std entropy change
of fusion, ΔfusSo49.26 J/(mol·K) Std enthalpy change
of vaporization, ΔvapHo52.9 kJ/mol Std entropy change
of vaporization, ΔvapSo? J/(mol·K) Solid properties Std enthalpy change
of formation, ΔfHosolid? kJ/mol Standard molar entropy,
Sosolid? J/(mol K) Heat capacity, cp ? J/(mol K) Liquid properties Std enthalpy change
of formation, ΔfHoliquid–203.4 kJ/mol Standard molar entropy,
Soliquid188.78 J/(mol K) Enthalpy of combustion, ΔcH o–2037.3 kJ/mol Heat capacity, cp 153 J/(mol K) at 25°C Gas properties Std enthalpy change
of formation, ΔfHogas–150.5 kJ/mol Standard molar entropy,
Sogas? J/(mol K) Heat capacity, cp ? J/(mol K) Vapor pressure of liquid
vapor pressure at 20°C = 0.556 mbar = 0.417 mmHg[2]
Distillation data
Vapor-liquid Equilibrium
for Dimethyl Sulfoxide/Water[4]
P = 550 mm HgBP
Temp.
°C% by mole water liquid vapor 168.4 6.5 34.6 160.9 10.8 51.8 153.1 16.4 62.7 146.4 21.2 71.0 140.6 26.7 78.4 135.1 32.1 83.9 130.8 37.4 87.6 124.3 44.8 91.7 121.0 48.5 93.5 114.9 55.4 96.0 107.8 66.4 98.0 102.1 74.4 98.9 97.2 84.0 99.6 96.3 85.7 99.6 93.9 91.9 99.8 Vapor-liquid Equilibrium
for Dimethyl Sulfoxide/Ethanol[4]
P = 14.665 kPaBP
Temp.
°C% by mole DMSO liquid vapor 55.80 48.75 1.0 64.50 59.75 1.6 66.75 64.00 2.5 70.80 71.00 3.6 76.50 76.25 5.0 81.50 80.50 6.0 91.50 85.00 13.0 100.74 90.00 21.0 Spectral data
UV-Vis λmax 275 nm Extinction coefficient, ε ? IR Sectrum NIST Major absorption bands 3000, 2900, 1200–1240, 1000–1080, 960, 690 cm−1 NMR Proton NMR 2.54((CD3)2SO),; Carbon-13 NMR 40ppm; Other NMR data MS Masses of
main fragmentsReferences
- ^ a b Merck Index of Chemicals and Drugs, 9th ed. monograph 3249
- ^ a b c d e "Dimethyl Sulfoxide (DMSO) -- Technical". Atofina Chemicals, inc. http://www.bulkmsm.com/research/msm/page12.htm. Retrieved 26 May 2007.
- ^ "Pure Component Properties" (Queriable database). Chemical Engineering Research Information Center. http://www.cheric.org/research/kdb/hcprop/cmpsrch.php. Retrieved 26 May 2007.
- ^ a b "Binary Vapor-Liquid Equilibrium Data" (Queriable database). Chemical Engineering Research Information Center. http://www.cheric.org/research/kdb/hcvle/hcvle.php. Retrieved 26 May 2007.
Except where noted otherwise, data relate to standard ambient temperature and pressure.
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