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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

The 48-h EC50 value is >100 mg/L in Daphnia magna.	

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
100 mg/L

Additional information

The acute toxicity of the test substance to Daphnia magna was determined in a 48-hour static test according to the EU Commission Directive 92/69/EEC, Part C.2 (1992), and the OECD Guideline for Testing of Chemicals, No. 202, Part I (1984).

A limit test was performed in accordance with the EU Commission Directive 92/69/EEC to demonstrate that the test item has no toxic effect on the test organisms up to and including a concentration of 100 mg/L. Thus, the only concentration tested was nominal 100 mg/L. Additionally, a control was tested in parallel. The test item concentration in the test medium at the start and the end of the test was 100 and 103% of the nominal value, respectively. Thus, the testsubstance was stable over the test period of 48 hours. Therefore, all reported results are based on the nominal concentration of the test item.

In the control and at the test item concentration of 100 mg/L, no significant number of immobilized test organisms were observed during the test period of 48 hours. The 48-hour NOEC (highest concentration tested without toxic effects after the exposure period of 48 hours) and the 48-hour EC0 to Daphnia magna were determined to be at least 100 mg/L. These values might even be higher but concentrations above 100 mg/L were not tested, according to the EU Commission Directive. The 48-hour EC50 and the 48-hour EC100 were clearly higher than 100 mg/L. These values could not be quantified due to the absence of toxicity at the test concentration of 100 mg/L.