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Short-term toxicity to aquatic invertebrates

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Description of key information

The 48h-EC50 = 78 µg/l Hydroxyambran

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
78 µg/L

Additional information

The daphnia toxicity of Hydroxyambran was determined according to the OECD Test Guideline 202.

The main study was performed using 9 concentrations ranging from 293 - 3 µg/l. Twenty daphnia were exposed to each concentration of the test item for 48 hours. After 24 and 48 hours, the immobilised dahnia were counted.

Not any of the daphnia was immobilised in the control, the results of the tests with the reference substance show the ability of the test procedure.

The test article concentration was only analytically determined on the start of experiment in the highest concentration. All other concentrations are thenominal concentrations which are the calculated concentrations using the dilution factor and the measured concentration of the saturated stock solution.

The following results were determined for Hydroxyambran (species:Daphnia magna):

24h-NOEC = 52 µg/l

48h-NOEC = 29 µg/l

24h-EC50 = 116 µg/l

48h-EC50 = 78 µg/l