Structure x | Common name | pK2 | ∆H˚ | ∆S˚ | ∆Cp˚ | Ref. |
| PIPERAZINE | 9.731 | 53.390 | −33.9 | 88 | 2 |
| PIPES | 7.140 | 11.964 | −96.5 | 124 | This study |
| HEPBS | 8.284 | 23.081 | −84.4 | 77 | 20 |
| HEPES | 7.562 | 20.376 | −76.6 | 46 | 21 |
| TAURINE | 9.061 | 41.840 | −33.1 | −33 | 1 |
| MOPS | 7.183 | 21.008 | −69.7 | 17 | 4 |
| BES | 7.187 | 24.184 | −56.5 | −4 | 5 |
| TES | 7.550 | 32.133 | −36.8 | −17 | 6 |
| CHES | 9.394 | 39.551 | −49.1 | 10 | 7 |