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Diss Factsheets

Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Administrative data

Link to relevant study record(s)

Description of key information

Under the conditions of the present study, the test item did not induce biologically relevant immobilization of Daphnia magna at and below 18 mg/l after 24 hours of exposure (NOEC) with a 24h-EC50 of 33.4 mg/l (95% confidence interval between 26.2 and 43.8 mg/l)

Key value for chemical safety assessment

Additional information

Daphnia were exposed for 24 hours to a concentration range of 3.2 to 100 mg/l forming a geometric progression with a factor of 1.8. The test was performed in duplicate with 10 daphnia per vessel.

After 24 hours of exposure the total rate of immobil ization of daphnia was 90% at 100 mg/l, 85% at 56 mg/l, 60% at 32 mg/l and 10% at 10 mg/l. At concentrations of 18 mg/l and 5.6 mg/l and lower no immobilization of daphnia was seen.

The 24h-EC50 was 33.4 mg/l with 95% confidence interval ranging from 26.2 to 43.8 mg/l (slope = 6 0)

Finally, the No Observed Effect Concentration for the test item with respect to mobility of Daphnia magna was found to be 18 mg/l after 24 hours of exposure.