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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

Key value for chemical safety assessment

EC10 or NOEC for freshwater algae:
76 mg/L

Additional information

In the Klimisch 1 GLP study the acute toxicity of the test item on Desmodesmus subspicatus was determined in an 48 hour static test according to OECD 201 and EU method C.3. The test was performed with concentrations of control and 0.01, 0.1, 1.00, 10.0 and 100 mg/L. The measured concentrations of test item in the test media of the biologically relevant test concentrations of 100 mg/L were between 101% of the nominal values at the start of the test and 48% at the end of the test. Thus, the correct dosage of the test item was confirmed. The test item concentration declined in the test media over the test period of 72 hours. The biological results were related to the mean measured test item concentrations calculated as the geometric means of the concentrations measured at the start and end of the test. The data were evaluated based on mean measured concentrations. The NOEC is 76 mg/L.