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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

The test substance did not show  any toxic effect in the range of water solubility and is not harmful to fish it can be concluded that cenospheres are not harmful to fish.

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Additional information

Acute toxicity of a siliceous ash (SiO2 42%) to fish was tested in a GLP-study according to OECD TG 203. A limit test with a loading rate of 100 mg/L was performed on Poecilia reticulata. The tested 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. After 96 h of exposure no mortality was observed. Based on this loading rate a NOELR of 100 mg/L (nominal value) was determined. As no mortality could be observed the LL50 is defined to be > 100 mg/L (ČEZ Energetické produkty, a. s., 2008).