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Long-term toxicity to aquatic invertebrates

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Description of key information

Determination of the chronic toxicity to Daphnia magna with FAT 40870/A TE (Reproduction test on daphnia magna).

Key value for chemical safety assessment

EC10, LC10 or NOEC for freshwater invertebrates:
25

Additional information

The chronic toxicity of the test item was assessed in a Daphnia magna reproduction test. 

Based on the results of acute toxicity range finding test and an initial test, Daphnia magna were exposed (10 replicates of a single daphnid per group) to solutions of the test item at nominal concentrations of 3.125, 6.25, 12.5, 25 and 50 mg/L in Elendt M7 media for a period of 21 days.

Exposure of Daphnia magna to the test item gave the following results based on the nominal test concentrations:

 

Endpoint

Concentration (mg/L)

Immobilization

EC10

15*

 

EC50

37*

Reproduction

EC10

19*

 

EC50

>50*

No Observed Effect Concentration (NOEC)

25

Lowest Observed Effect Concentration (LOEC)

50

Maximum Acceptable Toxicant Concentration (MATC)

35

 

*Not possible to determine 95% confidence limits as the data did not fit the available models