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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

The test substance is not harmful to aquatic invertebrates and it can be regarded that cenospheres has no harmful effects on invertebrates.

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Additional information

One limit tests according to OECD TG 202 water accommodate fractions (WAFs) of fly ash was prepared. The toxicity of the soluble fractions of the ash contained in the WAFs was assessed by observations on the mobility of Daphnia magna. After a testing period of 48 hours no adverse effects could be determined up to the loading rate of 100 mg/L. The tested fly ash was structural related to ash (residues), cenospheres and as cenospheres are a component of fly ash, these results can be used as read across. The EL50 could not be determined as they were beyond the range tested, exceeding a loading rate of 100 mg/L. NOEL for ash equalled a loading rate of >= 100 mg/L. Based on these findings the substance is not to be harmful to Daphnia magna and it can be concluded that cenospheres are also not harmful to aquatic invertebrates.