Dimethyl sulfoxide (data page)

From testwiki
Jump to navigation Jump to search

Template:Short description Template:Use dmy dates 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.

Structure and properties

Template:Chembox header | 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

Thermodynamic properties

Template:Chembox header | 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, 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)
Template:Chembox header | Solid properties
Std enthalpy change
of formation, ΔfHosolid 		? kJ/mol
Standard molar entropy,
Sosolid 		? J/(mol K)
Heat capacity, cp 149.40 J/(mol·K)
Template:Chembox header | 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
Template:Chembox header | 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]

log10 of dimethyl sulfoxide vapor pressure. Uses formula logePmmHg=loge760101.325−4.215616loge(T+273.15)−7522.806T+273.15+46.78064−2.450859×10−7(T+273.15)2 obtained from CHERIC[3]

Template:Clear

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

Template:Chembox header | UV-Vis
λmax <220 nm
Extinction coefficient, ε 0.0034 %−1 cm−1 in unpHed water at 260 nm
Template:Chembox header | IR
Spectrum NIST
Major absorption bands 3000, 2900, 1200–1240, 1000–1080, 960, 690 cm−1
Template:Chembox header | NMR
Proton NMR 2.54((CD3)2SO), 2.71 in D2O;[5]
Carbon-13 NMR 40ppm;
Other NMR data  
Template:Chembox header | MS
Masses of
main fragments 		 

References

Template:Reflist

Template:Chemical data page general note

  1. ↑ 1.0 1.1 Merck Index of Chemicals and Drugs, 9th ed. monograph 3249
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Template:Cite web
  3. ↑ Template:Cite web
  4. ↑ 4.0 4.1 Template:Cite web
  5. ↑ Template:Cite journal
Retrieved from "https://en.wiki.beta.math.wmflabs.org/w/index.php?title=Dimethyl_sulfoxide_(data_page)&oldid=20790"