(Translated by https://www.hiragana.jp/)
Dielectric Constant
The Wayback Machine - https://web.archive.org/web/20100704013154/http://macro.lsu.edu/HowTo/solvents/Dielectric%20Constant%20.htm
Dielectric Constant
Burdick & Jackson solvents are arranged in order of increasing dielectric constant, the ratio of the electrical capacity of a capacitor filled with the solvent to the electrical capacity of the evacuated capacitor (at 20°C unless otherwise indicated).

 
  Dielectric Constant
Pentane 1.84
Hexane 1.88 (25°C)
Heptane 1.92
Iso-Octane 1.94
Cyclopentane 1.97
   
Cyclohexane 2.02
1,2,4-Trichlorobenzene 2.24 (25°C)
1,4-Dioxane 2.25
Toluene 2.38 (25°C)
   
1,1,2-Trichlorotrifluoroethane 2.41 (25°C)
Triethylamine 2.42 (25°C)
o-Xylene 2.57
Ethyl Ether 4.33
Chloroform 4.81
   
n-Butyl Acetate 5.01
Chlorobenzene 5.62 (25°C)
Ethyl Acetate 6.02 (25°C)
Glyme 7.20 (25°C)
n-Butyl Chloride 7.39
   
Tetrahydrofuran 7.58 (25°C)
Trifluoroacetic Acid 8.55
Dichloromethane 8.93 (25°C)
o-Dichlorobenzene 9.93 (25°C)
Ethylene Dichloride 10.36 (25°C)
   
Pyridine 12.4
Methyl Isobutyl Ketone 13.11 (25°C)
Methyl n-Propyl Ketone 15.45
Isobutyl Alcohol 16.68
2-Methoxyethanol 16.93
   
n-Butyl Alcohol 17.51 (25°C)
Methyl Ethyl Ketone 18.51
Isopropyl Alcohol 19.92 (25°C)
n-Propyl Alcohol 20.33 (25°C)
Acetone 20.7 (25°C)
   
Ethyl Alcohol 24.55 (25°C)
N-Methylpyrrolidone 32.2 (25°C)
Methanol 32.70 (25°C)
N,N-Dimethylformamide 36.71 (25°C)
Acetonitrile 37.5
   
Dimethyl Acetamide 37.78 (25°C)
Dimethyl Sulfoxide 46.68
Propylene Carbonate 64.9
 
Water 80.1
 


Not included:
Isopropyl Myristate
Methyl t-Butyl Ether
Methyl Isoamyl Ketone
Petroleum Ether