Organotin Compound |
Endpoint for Most Sensitive Environmental Organism |
Factors Applied |
Estimated Effects Threshold (EET) |
Environmental Concentrations (EC) |
EET/EC |
|---|---|---|---|---|---|
Monomethyltin (Freshwater) |
48-hour LC50 for Daphnia magna 460 µg Sn/L (Steinhauser et al., 1985) |
20a x 2c |
11.5 µg Sn/L |
0.324 µg Sn/L (mean across Canada were detected; detection frequency = 12% |
35 |
Monomethyltin (Marine) |
72-hour EC50 for growth in the diatom Skeletonema costatum 40 µg Sn/L (Walsh et al., 1985) |
20a x 2c |
1.0 µg Sn/L |
0.1 µg Sn/L (mean in seawater where detected; detection frequency = 3% |
10 |
Dimethyltin (Freshwater) |
48-hour LC50 for Daphnia magna 30 µg Sn/L (Steinhauser et al., 1985) |
20a |
1.5 µg Sn/L |
0.092 µg Sn/L (mean across Canada where detected; detection frequency = 10% |
16 |
Dimethyltin (Marine) |
72-hour EC50 for growth in the diatom Skeletonema costatum > 270 µg Sn/L (Walsh et al, 1985) |
20a |
> 13.5 µg Sn/L |
<0.01 µg Sn/L (no detection observed in seawater, n = 70; detection limit = 0.01 µg Sn/L) |
> 1350 |
Monobutyltin (Freshwater) |
48-hour LC50 for the red killifish, Oryzias latipes 16 000 µg Sn/L (Nagase et al., 1991) |
20a x 4c |
200 µg Sn/L |
0.216 µg Sn/L (mean across Canada were detected; detection frequency = 24%) |
926 |
Monobutyltin (Marine) |
48-hour IC50 for growth inhibition in selected marine yeasts 2100 µg Sn/L (Cooney et al., 1989) |
20a x 10c |
10.5 µg Sn/L |
0.018 µg Sn/L (mean in seawater where detected; detection frequency = 19% |
583 |
Dibutyltin (Freshwater) |
110 d LOEL for mortality in rainbow trout, Oncorhynchus mykiss 95 µg Sn/L (de Vries et al., 1991) |
10b |
9.5 µg Sn/L |
0.148 µg Sn/L (mean across Canada where detected; detection frequency = 24% |
64 |
Dibutyltin (Marine) |
72-hour EC50 for growth in the diatom Skeletonema costatum 10 µg Sn/L (Walsh et al., 1985) |
20a |
0.5 µg Sn/L |
0.098 µg Sn/L (mean in seawater where detected; detection frequency = 29% |
5 |
Mono-octyltin (Freshwater) |
No toxicity data available |
N/A |
N/A |
<0.01 µg Sn/L (no detections observed across Canada, n = 274; detection limit = 0.01 µg Sn/L) |
N/A |
Mono-octyltin (Marine) |
No toxicity data available |
N/A |
N/A |
<0.01 µg Sn/L (no detections observed in seawater, n = 70; detection limit = 0.01 µg Sn/L) |
N/A |
Dioctyltin (Freshwater) |
48-hour LC50 for Daphnia magna 1.0 µg Sn/L (Steinhauser et al., 1985) |
20a x 10c |
0.005 µg Sn/L |
<0.01 µg Sn/L (no detections observed across Canada, n = 274; detection limit = 0.01 µg Sn/L) |
>0.5 |
Dioctyltin (Marine) |
No toxicity data available |
N/A |
N/A |
<0.01 µg Sn/L (no detections observed in seawater, n = 70; detection limit = 0.01 µg Sn/L) |
N/A |