Registration Dossier
Registration Dossier
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EC number: 238-485-8 | CAS number: 14484-69-6
Endpoint summary
Administrative data
Description of key information
Additional information
No aquatic toxicity tests are available for potassium tetrafluoroaluminate. The results from the structural analogue multiconstituent aluminium potassium fluoride are used instead (for details see Reporting Format as attached to the respective IUCLID entry and CSR Appendix B.3). Reliable GLP compliant aquatic acute ecotoxicity test results for the structural analogue multiconstituent aluminium potassium fluoride are available for fish, invertebrates and algae. As the contents of fluoride, expressed as a percentage of the molar weight in both substances are comparable, namely 53.5% for potassium tetrafluoroaluminate and ca. 51% for multiconstituent aluminium potassium fluoride, as a result no safety factor is applied. Instead, the effect concentrations will be corrected for molecular weight.
An OECD 203 study reported a 96-h LC50 for Brachydanio rerio of >10 mg/L (Solvay Pharmaceuticals, 2010a). The molecular weight corrected effect concentration for potassium tetrafluoroaluminate is 8.9 mg/L, which corresponds to an effect concentration of >4.75 mg fluoride/L.
An OECD 202 study showed that the 48-h EC50 for Daphnia magna is 22.8 mg/L (Solvay Pharmaceuticals, 1999). The molecular weight corrected effect concentration for potassium tetrafluoroaluminate is 20.2 mg/L, which corresponds to an effect concentration of 10.8 mg fluoride/L.
Two reliable OECD 201 studies with Nocolok Flux and Hot melt PAF (both multiconstituent aluminium potassium fluoride) report 72 -h EC50 values for growth rate of 33.5 and 12.7 mg/L, respectively. The 72 hr NOErC values were reported to be 11.2 and 4.3 mg/L, respectively. The lowest observed values, i.e. the ErC50 of 12.7 mg/L and NOErC of 4.3 mg/L will be used in the assessment. The molecular weight corrected effect concentrations for potassium tetrafluoroaluminate are ErC50 = 11.3 mg/L and NOErC = 3.8 mg/L, which corresponds to ErC50 and NOErC values of 6.0 mg fluoride/L and 2.0 mg fluoride/L, respectively.
One GLP-compliant OECD 209 guideline study is available on the toxicity to microorganisms for the structural analogue multiconstituent aluminium potassium fluoride. The 3-h EC50 is >75 mg/L in activated sludge (Solvay Pharmaceuticals, 2010c). The molecular weight corrected effect concentration for potassium tetrafluoroaluminate is >67 mg/L, which corresponds to an effect concentration of >36 mg fluoride/L.
Studies with sediment organisms for potassium tetrafluoroaluminate or any of its structural analogues are not available.
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