| [NaCl] (M) | Temp. (K) | pKa1(±3σ) | pKa2(±3σ) |
2,3-DHBA | 0.01 | 293 | 2.93 ± 0.05 | 10.07 ± 0.05 |
| 0.01 | 281 | 2.94 ± 0.04 | 10.26 ± 0.02 |
| 0.03 | 293 | 2.81 ± 0.05 | 10.29 ± 0.07 |
| 0.03 | 281 | 2.84 ± 0.06 | 10.44 ± 0.03 |
3,4-DHBA | 0.01 | 293 | 4.42 ± 0.02 | 8.71 ± 0.02 |
| 0.01 | 281 | 4.45 ± 0.02 | 9.16 ± 0.02 |
| 0.03 | 293 | 4.40 ± 0.03 | 8.99 ± 0.03 |
| 0.03 | 281 | 4.42 ± 0.03 | 9.26 ± 0.03 |