Illustrated Glossary of Organic Chemistry

Polar solvent: A solvent with dielectric constant (ε) > 20.

Some Common Polar Protic Solvents





Water (ε = 80)   
Methanol (ε = 33)   
Ethanol (ε = 25)

Some Common Polar Aprotic Solvents





DMSO (ε = 49)   
DMF (ε = 37)   
Acetone (ε = 21)