Dimethyl sulfoxide (data page)

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

Contents

1 Material Safety Data Sheet

2 Structure and properties

3 Thermodynamic properties

4 Vapor pressure of liquid

5 Distillation data

6 Spectral data

7 References

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], n_D 1.4795 at 20°C
1.4787 at 21°C

Abbe number ?

Dielectric constant,^[2] ε_r 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°C

Thermodynamic 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, Δ_fusH^o 14.37 kJ/mol

Std entropy change
of fusion, Δ_fusS^o 49.26 J/(mol·K)

Std enthalpy change
of vaporization, Δ_vapH^o 52.9 kJ/mol

Std entropy change
of vaporization, Δ_vapS^o ? J/(mol·K)

Solid properties

Std enthalpy change
of formation, Δ_fH^o_solid ? kJ/mol

Standard molar entropy,
S^o_solid ? J/(mol K)

Heat capacity, c_p ? J/(mol K)

Liquid properties

Std enthalpy change
of formation, Δ_fH^o_liquid –203.4 kJ/mol

Standard molar entropy,
S^o_liquid 188.78 J/(mol K)

Enthalpy of combustion, Δ_cH^o –2037.3 kJ/mol

Heat capacity, c_p 153 J/(mol K) at 25°C

Gas properties

Std enthalpy change
of formation, Δ_fH^o_gas –150.5 kJ/mol

Standard molar entropy,
S^o_gas ? J/(mol K)

Heat capacity, c_p ? J/(mol K)

Vapor pressure of liquid

vapor pressure at 20°C = 0.556 mbar = 0.417 mmHg^[2]

log₁₀ of Dimethyl sulfoxide vapor pressure. Uses formula: $\scriptstyle \log_e P_{mmHg} =$ $\scriptstyle \log_e (\frac {760} {101.325}) - 4.215616 \log_e(T+273.15) - \frac {7522.806} {T+273.15} + 46.78064 - 2.450859 \times 10^{-7} (T+273.15)^2$ obtained from CHERIC^[3]

Distillation data

Vapor-liquid Equilibrium
for Dimethyl Sulfoxide/Water^[4]
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^[4]
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

λ_max 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 fragments

References

^ ^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.

"NIST Standard Reference Database"]. http://webbook.nist.gov/chemistry/.

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

Disclaimer applies.

Categories:
Chemical data pages

Structure and properties
Index of refraction^[1], n_D	1.4795 at 20°C 1.4787 at 21°C
Abbe number	?
Dielectric constant,^[2] ε_r	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°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, Δ_fusH^o	14.37 kJ/mol
Std entropy change of fusion, Δ_fusS^o	49.26 J/(mol·K)
Std enthalpy change of vaporization, Δ_vapH^o	52.9 kJ/mol
Std entropy change of vaporization, Δ_vapS^o	? J/(mol·K)
Solid properties
Std enthalpy change of formation, Δ_fH^o_solid	? kJ/mol
Standard molar entropy, S^o_solid	? J/(mol K)
Heat capacity, c_p	? J/(mol K)
Liquid properties
Std enthalpy change of formation, Δ_fH^o_liquid	–203.4 kJ/mol
Standard molar entropy, S^o_liquid	188.78 J/(mol K)
Enthalpy of combustion, Δ_cH^o	–2037.3 kJ/mol
Heat capacity, c_p	153 J/(mol K) at 25°C
Gas properties
Std enthalpy change of formation, Δ_fH^o_gas	–150.5 kJ/mol
Standard molar entropy, S^o_gas	? J/(mol K)
Heat capacity, c_p	? J/(mol K)

UV-Vis
λ_max	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 fragments

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Dimethyl sulfoxide (data page)

Contents

Material Safety Data Sheet

Structure and properties

Thermodynamic properties

Vapor pressure of liquid

Distillation data

Spectral data

References

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Dimethyl sulfoxide (data page)

Contents

Material Safety Data Sheet

Structure and properties

Thermodynamic properties

Vapor pressure of liquid

Distillation data

Spectral data

References

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