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Dimethyl
sulfoxide
(data
page)&o=10616
Dimethyl sulfoxide (data page)&o=10616

Dimethyl sulfoxide (data page)
This page provides supplementary chemical data on dimethyl sulfoxide.

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, nD 1.4795 at 20°C
1.4787 at 21°C
Abbe number ?
Dielectric constant, εr 48 ε0 at 20 °C
Bond strength ?
Bond length ?
Bond angle ?
Magnetic susceptibility ?
Surface tension 43 dyn/cm at 20°C
Viscosity 2.14 mPa·s at 20°C
1.1 mP·s at 27°C

Thermodynamic properties

Phase behavior
Triple point 291.67 K (18.52 °C), ? Pa
Critical point 720 K (447 °C), 5630 kPa
Std enthalpy change
of fusion, ΔfusHo 		14.37 kJ/mol
Std entropy change
of fusion, ΔfusSo 		49.26 J/(mol·K)
Std enthalpy change
of vaporization, ΔvapHo 		52.9 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,
Soliquid 		188.78 J/(mol K)
Enthalpy of combustion, ΔcHo –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 = 0.0556 mbar = 0.0417 mmHg


Distillation data

Vapor-liquid Equilibrium
for Dimethyl Sulfoxide/Water
P = 550 mm Hg
BP
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
P = 14.665 kPa
BP
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 ? nm
Extinction coefficient, ε ?
IR
Sectrum NIST
Major absorption bands 3000, 2900, 1200-1240, 1000-1080, 960, 690 cm−1
NMR
Proton NMR  
Carbon-13 NMR  
Other NMR data  
MS
Masses of
main fragments 		 

References

Except where noted otherwise, data relate to standard ambient temperature and pressure.

Chemical infobox applies.

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Last updated on Sunday May 27, 2007 at 21:13:30 PDT (GMT -0700)
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