| Pesticides | Chemical Structures | pKa |
| Atrazine (AT) |  |
1.68-1.85 |
| Simazine (SI) |  |
1.65-1.80 |
| Deethyl-atrazine (DEA) |  |
1.65 |
| Deisopropyl-atrazine (DIA) |  |
1.58 |
| Hydroxyl-atrazine (H-AT) |  |
5.2 |
| Hydroxyl-simazine (H-SI) |  |
5.2 |
