| Chelant | LogKML (T = 25˚C, I = 0.1 M) | ||||
| Cd | Cu | Ni | Pb | Zn | |
| EDTA | 16.5 | 18.8 | 20.1 | 18.8 | 17.5 |
| EDDS | 10.8 | 18.4 | 16.8 | 12.7 | 13.4 |
| Hacac | nd | 8.2 | 5.5 | nd | nd |
| CA | 4.0 | 5.9 | 6.6 | 4.1 | 6.2 |