Table 2.
Physical-chemical parameters of neonicotinoids and fipronil determining their translocation capacity within the plant
| Active substance | Molecular weight (g/mol) | Water solubility (g/L) | Octanol/water partition coefficient (log P ow) | Dissociation constant (pK a) |
|---|---|---|---|---|
| Fipronil | 437.15 | 0.00378 | 3.75 | No dissociation |
| Imidacloprid | 255.7 | 0.61 | 0.57 | No dissociation |
| Thiamethoxam | 291.71 | 4.1 | −0.13 | No dissociation |
| Thiacloprid | 252.72 | 0.184 | 1.26 | No dissociation |
| Clothianidin | 249.7 | 0.34 | 0.905 | 11.1 |
| Acetamiprid | 222.67 | 2.95 | 0.8 | 0.7 |
| Nitempyram | 270.72 | 590 | −0.66 | 3.1 |
| Dinotefuran | 202.21 | 39.83 | −0.549 | 12.6 |