Table 2.

Properties of usual polar aprotic solvents.

Properties	Sulfolane	DMSO	NMP	DMF	DMAc	THF	Dioxane	Acetone
Relative molecular mass	120.17	78.13	99.13	73.09	87.12	72.11	88.11	58.08
Density (g/cm3)	1.26	1.10	1.03	0.94	0.94	0.89	1.03	0.78
Boiling point (°C)	287.3	189.1	201.9	153.1	166.2	66	101.3	56.5
Freezing point (°C)	28.4	18.6	−24.4	−60.4	−20.1	−108	-	−94
Dielectric constant (ɛv)	43.4a	46.7b	32.2b	36.7b	37.8b	7.58	2.51b	20.7
Dielectric loss (tanδ)	-	0.825	0.275	0.161	-	-	-	-
Dipole moment (debye)	4.69	3.96	4.09	3.8	3.72	1.75	0.45	2.85
Hildebrand parameters	27.2	26.6	23.6	24.1	23.3	-	-	-
Solvent polarity parameters	0.410	0.444	0.355	0.386	0.377	-	-	-
Viscosity (cP)	10.35a	2.0b	1.67b	0.9c	2.14c	0.55c	1.31c	0.32b
Flash point (°C)	177	89	86	58	63	−20	12	−20
Self-ignition point (°C)	528	302	270	445	445	321	180	465
Vapor pressure (kPa)	0.0091a	0.060b	0.050b	0.37b	0.13b	19.3c	5.33b	24.7c

^a30°C.

^b25°C.

^c20°C.