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EC number: 234-666-0 | CAS number: 12021-95-3
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
The acute toxicity of the structural analogue dipotassium hexafluorozirconate to Daphnia magna was tested according to OECD 203; an EC50 of 110.7 mg/L was recalculated for dihydrogen hexafluorozirconate.
Key value for chemical safety assessment
Fresh water invertebrates
Fresh water invertebrates
- Effect concentration:
- 110.7 mg/L
Additional information
Dihydrogen hexafluorozirconate
The acute toxicity of dipotassium hexafluorozirconate to Daphnia magna was tested according to OECD 202. An EC50 of 110.7 mg/L was recalculated for dihydrogen hexafluorozirconate indicating a similar potential for acute toxicity to aquatic invertebrates (or a lack thereof) as other flouride substances (see below).
Potassium fluoride
Camargo & Tarazona (1991) report that benthic larvae are sensitive to the concentration of fluoride, with EC50 values ranging from 26 -48 mg F/L (actual concentration); however the study was performed in soft water. The EU RAR reviews and summarises the available data on short-term toxicity to aquatic invertebrates. The reported EC50 values for Daphnia sp. range from 97-352 mg F/L and are based on nominal concentrations; EC50 values of 10.5 -39 mg F/L are reported for marine invertebrates. The ICD summarises the available data on the short-term toxicity of sodium fluoride to aquatic invertebrates and reports EC50 values of 109 -340 mg F/L; EC50 values of 30 -500 mg F/L are reported for marine invertebrates.
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