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Short-term toxicity to aquatic invertebrates

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Description of key information

Based on the nominal concentrations of the test item the 48-h EC50 for Daphnia magna was estimated to be 70.7 mg/L (95 % confidence limits: 50.0 – 100 mg/L). The NOEC after 48 h was 50.0 mg/L. The LOEC after 48 h was 100 mg/L. 
The effects observed at the concentration level of 100 mg/L were caused by the low pH-values (pH below the recommended range of pH 6 – 9). This was confirmed by the pH-neutralized concentration level of 100 mg/L which caused no effects on Daphnia magna. Based on the pH-neutralized concentration the 48-h EC50 and the NOEC for Daphnia magna were > 100 mg/L.

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Additional information

Based on the nominal concentrations of the test item the 48-h EC50 for Daphnia magna was estimated to be 70.7 mg/L (95 % confidence limits: 50.0 – 100 mg/L). The NOEC after 48 h was 50.0 mg/L. The LOEC after 48 h was 100 mg/L.

The effects observed at the concentration level of 100 mg/L were caused by the low pH-values (pH below the recommended range of pH 6 – 9). This was confirmed by the pH-neutralized concentration level of 100 mg/L which caused no effects on Daphnia magna. Based on the pH-neutralized concentration the 48-h EC50 and the NOEC for Daphnia magna were > 100 mg/L.