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96-hour LC50 (rainbow trout) > 3.2 mg/L. NOEC = 3.2 mg/L.

The results of the acute toxicity study indicate that the EC50 for immobilisation of Daphnia magna exposed to S-205 is greater than the maximum solubility of S-205 in Daphnia synthetic medium, under the conditions of the test.

The NOEC, from the sub-acute study, for adult Daphnia immobilisation was calculated to be 100 mg/l nominal, indicating there was no significant difference between the numbers of immobile Daphnia at 100 mg/l and the control.

Under the conditions of the study, it was found that for algae the ECr50 = >1000 mg/l and the NOEC = 250 mg/l

The outcome of the microorganism study is that EC50 (3h) = > 3.2 mg/l