Registration Dossier
Registration Dossier
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EC number: 240-934-8 | CAS number: 16893-85-9
Endpoint summary
Administrative data
Description of key information
Additional information
Short term toxicity tests have been performed on disodium hexafluorosilicate. Toxicity to fish, algae and microorganism has been determined. However, there are no available data on long term toxicity to the aquatic environment. Due to the presence of hydrolysable groups on its chemical structure, fluorosilicate anions are not expected to remain in solution long under environmental conditions. Instead, fluoride anions will be formed. Thus, the performance of such tests is unjustified, since there are reliable studies on sodium fluoride or hydrogen fluoride. Read-across to sodium fluoride is appropriate.
Short-term toxicity to fish
Disodium hexafluorosilicate shows a 96 h-LC50 on Dario rerio of 37.5 mg/L.
Short-term toxicity to aquatic invertebrates
Disodium hexafluorosilicate shows a 48 h-LC50 on Daphnia magna of 35.4 mg/L.
Toxicity to algae
Disodium hexafluorosilicate shows a 48 h-LC50 on Pseudokirchneriella subcapitata of 18 mg/L.
Long-term toxicity to fish
Sodium fluoride shows a 21 day LC5 onOncorhynchus mykissof 4 mg/L. This value is considered as NOEC for mortality.
Long-term toxicity to aquatic invertebrates
Sodium fluoride shows a 21 day NOEC on Daphnia magna of of 3.7 and 14.1 mg/L.
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