ACUTE TOXICITY TO RAINBOW TROUT/ Mn metal (Manganese metal)/ OECD 203 / GLP
Introduction. A study was performed to assess the acute toxicity of the test item to rainbow trout (Oncorhynchus mykiss). The method followed that described in the OECD Guidelines for Testing of Chemicals (1992) No 203, "Fish, Acute Toxicity Test", referenced as Method C1 of Commission Regulation (EC) No. 440/2008.
Results. The 96-Hour LC50 based on nominal test concentrations was greater than 100% v/v saturated solution and correspondingly the No Observed Effect Concentration was 100% v/v saturated solution.
Analysis of the test preparations at 0, 24 and 96 hours showed measured concentrations to range from 3.05 to 4.44 mg/l.
Given that no decline in measured concentration was observed over the test period, the results are based on the mean measured test concentration as a test item only. This was calculated to be 3.6 mg/l.
The 96-Hour LC50 based on mean measured test concentrations was greater than 3.6 mg/l and correspondingly the No Observed Effect Concentration was 3.6 mg/l.
This study showed that there were no toxic effects at saturation.
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