Burdick and Jackson Polarity Index of Selected Solvents

Solvents are arranged in order of increasing polarity index, a relative measure of the degree of interaction of the solvent with various polar test solutes.

    
Solvent Polarity Index
Pentane0.0
1,1,2-Trichlorotrifluoroethane1.6
Cyclopentane0.2
Heptane0.1
Hexane0.1
Iso-Octane0.1
Petroleum Ether0.1 - 0.3
Cyclohexane0.2
 
n-Butyl Chloride2.0
Toluene2.4
Methyl t-Butyl Ether2.5
o-Xylene2.5
Chlorobenzene2.7
o-Dichlorobenzene2.8
Ethyl Ether2.8
Dichloromethane3.1
Triethylamine3.2
Ethylene Dichloride3.5
n-Butyl Alcohol3.9
n-Butyl Acetate4.0
Isobutyl Alcohol4.0
Methyl Isoamyl Ketone4.0
n-Propyl Alcohol4.0
Tetrahydrofuran4.0
 
Chloroform4.1
Methyl Isobutyl Ketone4.2
Isopropyl Alcohol4.3
Ethyl Acetate4.4
Methyl n-Propyl Ketone4.6
Methyl Ethyl Ketone4.7
1,4-Dioxane4.8
Acetone5.1
Methanol5.1
Ethanol5.2
Pyridine5.3
2-Methoxyethanol5.4
 
Acetonitrile5.8
Propylene Carbonate6.0
Trifluoroacetic Acid6.0
N,N-Dimethylformamide6.4
Dimethyl Acetamide6.5
N-Methylpyrrolidone6.7
 
Dimethyl Sulfoxide7.2
Water10.2