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Ecotoxicological information

Long-term toxicity to aquatic invertebrates

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Description of key information

The 21-day NOEC was 12.5 mg/L. 

Key value for chemical safety assessment

EC10, LC10 or NOEC for freshwater invertebrates:
12.5 mg/L

Additional information

A study according to OECD Guideline 211, was performed to assess the chronic toxicity of the test item to Daphnia magna. Based on the results of a preliminary range-finding test, Daphnia magna were exposed to solutions of the test item at nominal concentrations of 6.25, 12.5, 25, 50 and 100 mg/L for a period of 21 days. The numbers of live and dead adult daphnia and young daphnids (live and dead) were determined daily. Exposure of Daphnia magna to the test item gave the following results based on the nominal test concentrations:

- The immobilisation EC10 was 14 mg/L.

- The immobilisation EC50 was 68 mg/L

95 % confidence limits were not determined due to mathematical reasons or inappropriate data.

- The reproduction EC10 was 33 with 95 % confidence limits of 9.7 – 47 mg/L.

- The reproduction EC50 was 76 mg/L with 95 % confidence limits of 58 - > 100 mg/L.

- The NOEC was 12.5 mg/L. The LOEC was 25 mg/L. The maximum acceptable toxicant concentration (MATC) was 18 mg/L.