Registration Dossier
Registration Dossier
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EC number: 229-912-9 | CAS number: 6834-92-0
Long-term toxicity to fish
Administrative data
Link to relevant study record(s)
Description of key information
No NOEC available
Key value for chemical safety assessment
Additional information
Desmodesmus subspicatus and Brachydanio rerio were found to be the most sensitive species revealing very similar EC50 values (207 and 210 mg/L). For algae the chronic NOEC/EC0 for the more sensitive endpoint (biomasse) was determine to be 35 mg/L. Silica is found in European rivers in mean concentrations of 7.5 mg SiO2/L (Jorgensen et al. 1991). Therefore, the NOEC for fish in chronic toxicity tests is expected to be comparable to the NOEC for Desmodesmus. Further testing is not appropriate and should be avoided due to animal welfare.
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