This page provides supplementary chemical data on dimethyl sulfoxide.
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.
Structure and properties | |
---|---|
Index of refraction, [1] nD | 1.4795 at 20 °C 1.4787 at 21 °C |
Abbe 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 mPa·s [1] at 27 °C |
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, ΔfusH |
14.37 kJ/mol |
Std entropy change of fusion, ΔfusS |
49.26 J/(mol·K) |
Std enthalpy change of vaporization, ΔvapH |
52.9 kJ/mol |
Std entropy change of vaporization, ΔvapS |
? J/(mol·K) |
Solid properties | |
Std enthalpy change of formation, ΔfH |
? kJ/mol |
Standard molar entropy, S |
? J/(mol K) |
Heat capacity, cp | 149.40 J/(mol·K) |
Liquid properties | |
Std enthalpy change of formation, ΔfH |
−203.4 kJ/mol |
Standard molar entropy, S |
188.78 J/(mol·K) |
Enthalpy of combustion, ΔcH |
−2037.3 kJ/mol |
Heat capacity, cp | 153 J/(mol·K) at 25 °C |
Gas properties | |
Std enthalpy change of formation, ΔfH |
−150.5 kJ/mol |
Standard molar entropy, S |
? J/(mol·K) |
Heat capacity, cp | ? J/(mol·K) |
vapor pressure at 20 °C = 0.556 mbar = 0.417 mmHg [2]
|
|
UV-Vis | |
---|---|
λmax | <220 nm |
Extinction coefficient, ε | 0.0034 %−1 cm−1 in unpHed water at 260 nm |
IR | |
Spectrum | NIST |
Major absorption bands | 3000, 2900, 1200–1240, 1000–1080, 960, 690 cm−1 |
NMR | |
Proton NMR | 2.54((CD3)2SO), 2.71 in D2O; [5] |
Carbon-13 NMR | 40ppm; |
Other NMR data | |
MS | |
Masses of main fragments |
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help)This page provides supplementary chemical data on dimethyl sulfoxide.
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.
Structure and properties | |
---|---|
Index of refraction, [1] nD | 1.4795 at 20 °C 1.4787 at 21 °C |
Abbe 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 mPa·s [1] at 27 °C |
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, ΔfusH |
14.37 kJ/mol |
Std entropy change of fusion, ΔfusS |
49.26 J/(mol·K) |
Std enthalpy change of vaporization, ΔvapH |
52.9 kJ/mol |
Std entropy change of vaporization, ΔvapS |
? J/(mol·K) |
Solid properties | |
Std enthalpy change of formation, ΔfH |
? kJ/mol |
Standard molar entropy, S |
? J/(mol K) |
Heat capacity, cp | 149.40 J/(mol·K) |
Liquid properties | |
Std enthalpy change of formation, ΔfH |
−203.4 kJ/mol |
Standard molar entropy, S |
188.78 J/(mol·K) |
Enthalpy of combustion, ΔcH |
−2037.3 kJ/mol |
Heat capacity, cp | 153 J/(mol·K) at 25 °C |
Gas properties | |
Std enthalpy change of formation, ΔfH |
−150.5 kJ/mol |
Standard molar entropy, S |
? J/(mol·K) |
Heat capacity, cp | ? J/(mol·K) |
vapor pressure at 20 °C = 0.556 mbar = 0.417 mmHg [2]
|
|
UV-Vis | |
---|---|
λmax | <220 nm |
Extinction coefficient, ε | 0.0034 %−1 cm−1 in unpHed water at 260 nm |
IR | |
Spectrum | NIST |
Major absorption bands | 3000, 2900, 1200–1240, 1000–1080, 960, 690 cm−1 |
NMR | |
Proton NMR | 2.54((CD3)2SO), 2.71 in D2O; [5] |
Carbon-13 NMR | 40ppm; |
Other NMR data | |
MS | |
Masses of main fragments |
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