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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

In the 48-hour static acute toxicity test to Daphnia magna with the test substance the 48-hour EC50 value was determined as 0.037 mg/L.

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
0.037 mg/L

Additional information

In the 48-hour static acute toxicity test to Daphnia magna with the test substance the 48-hour EC50 value was determined as 0.037 mg/L (Probit analysis). The 48-hour NOEC was determined to be lower than 0.022 mg/L, while the 48-hour LOEC was 0.022 mg test item/L. The average measured concentration of the test item in the test solution was in the range 0.020 – 0.306 mg/L at the start and 0.024 – 0.408 mg/L at the end of the test. There is evidence that the concentration of the tested substance was satisfactorily not maintained within ± 20 % of the nominal concentration throughout the test. Therefore the analysis of the results was based on the geometric mean of the measured concentration values. All validity criteria were within acceptable limits and therefore the study can be considered as valid.