| Property | Methyl-Hg | Ethyl-Hg | Propyl-Hg | |
| Molecular weight | 215 | 229.6 | 243 | |
| % Hg content | 93.0 | 87.1 | 82.3 | |
| Half-life (days, human) | 50 - 80 [26] | 4 - 10 [27] | ? | |
| Level in brain (ppm, rat) [28] | 10.4 | 1.1 | 3.0 | |
| Distribution after 2 d (mouse) [29] | 10% liver, 10% kidney 0.8% brain, 0.4% spleen | 27% liver, 10% kidney 0.3% brain, 0.2% spleen | 12% liver, 6% kidney 0.6% brain, 0.3% spleen | |