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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

NOEL (96h, growth rate and yield) = 100 mg/L test material, corresponding to 55.1 mg/L of submission substance;
EL50 (96h, growth rate and yield) > 100 mg/L test material, corresponding to 55.1 mg/L of submission substance;

Key value for chemical safety assessment

Additional information

A toxicity test on the freshwater alga Pseudokirchneriella subcapitata had been performed with the submission substance according to relevant guidelines and compliant to GLP (reliability category 1). As the test item is light sensitive, the test period had been prolonged to 96 hours, with the first 24 hours incubation in the dark. As the test item was poorly soluble in water, after an initial range finding test a limit test with a water accomodated fraction at a nominal concentration of the test item of 100 mg/L had been conducted. No significiant effects coulde be determined with respect to growth rate, yield and appearance of the cells. The follwoing effect values were determined:

NOEL (96h, growth rate and yield) = 100 mg/L test material, corresponding to 55.1 mg/L of submission substance;

EL50 (96h, growth rate and yield) > 100 mg/L test material, corresponding to 55.1 mg/L of submission substance;