Table 3. Density (ρ) and Refractive Index (nD) of the Ionic Liquidsa.
| ionic liquid | ρ20 °Cb/g·cm–3 | ρ25 °Cb/g·cm–3 | nD 20 °Cc | nD 25 °Cc |
|---|---|---|---|---|
| [BMIM][ACR] | 1.0623 | 1.0597 | 1.5077 | 1.5062 |
| [BMIM][OAC] | 1.0586 | 1.0555 | 1.4933 | 1.4917 |
| [BMPyrr][FSI] | 1.3105 | 1.3066 | 1.4462 | 1.4448 |
| [Chol][Lys] | 1.1061 | 1.1030 | 1.5074 | 1.5060 |
| [DBUH][OAC] | 1.1101 | 1.1065 | 1.5208 | 1.5191 |
| [EMIM][ACR] | 1.1114 | 1.1083 | 1.5155 | 1.5135 |
| [EMIM][DCA]d | 1.1032 | 1.0999 | 1.5143 | 1.5127 |
| [EMIM][DEP] | 1.1484 | 1.1451 | 1.4742 | 1.4728 |
| [EMIM][FSI] | 1.4442 | 1.4373 | 1.4484 | 1.4470 |
| [EMIM][MeSO3] | 1.2452 | 1.2418 | 1.4970 | 1.4957 |
| [EMIM][OAc] | 1.1053 | 1.1023 | 1.5000 | 1.4982 |
| [EMIM][OOc] | 0.9992 | 0.9960 | 1.4859 | 1.4847 |
| [EMIM][OPr] | 1.0792 | 1.0761 | 1.4962 | 1.4951 |
| [EMIM][OTf] | 1.3852 | 1.3810 | 1.4362 | 1.4349 |
| [EMIM][SCN] | 1.1189 | 1.1159 | 1.5527 | 1.5511 |
| [EMIM][TFSI] | 1.5230 | 1.5179 | 1.4244 | 1.4229 |
| [HEXMIM][ACR] | 1.0310 | 1.0280 | 1.5017 | 1.5001 |
| [Pyrr][OAc]d | 1.0452 | 1.0417 | 1.4643 | 1.4627 |
| [Pyrr][OFm]d | 1.0627 | 1.0586 | 1.4639 | 1.4621 |
| [TEAH][MeSO3]d | 1.1191 | 1.1157 | 1.4624 | 1.4609 |
a
Temperature accuracy of the densiometer ±0.02 °C and of the refractometer ±0.03 °C. All measurements were conducted in ambient atmosphere at 101.3 kPa.
b
Measurement uncertainty below ±0.0005 g·cm–³.
c
Measurement uncertainty below ±0.0002.
d
Non-CBILS.