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Short-term toxicity to aquatic invertebrates

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Description of key information

Short-term toxicity to aquatic invertebrates: 48 hour EC50 >9.0 mg/L and a NOEC of ≥9.0 mg/L (measured) (highest concentration tested) (EU Method C.2 (Acute Toxicity for Daphnia)).

Key value for chemical safety assessment

Additional information

A 48 hour EC50 value of >9.0 mg/L and NOEC of ≥9.0 mg/L (measured) (highest concentration tested) have been determined for the effects of [2-(perfluorohexyl)ethyl]triethoxysilane (CAS 51851-37-7) on mobility of Daphnia magna based on mean measured initial Dissolved Organic Carbon (DOC) concentration. The test medium was prepared at an initial loading rate of 1000 mg/L of the substance and was subsequently filtered before introducing the test organisms.

Because hydrolysis rate is uncertain in test media, and because the extremely low water solubility of the test substance is may limit hydrolysis, it is likely that the test organisms were exposed to parent substance.