Registration Dossier
Registration Dossier
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EC number: 237-537-7 | CAS number: 13827-02-6
Endpoint summary
Administrative data
Description of key information
Additional information
As potassium trifluorozincate in water rapidly dissociates into its various ions, it is these ions that are expected to be present in the environment and which will therefore be assessed. Therefore, effect values for potassium trifluorozincate are also expressed as zinc and fluoride based on their respective molecular weight fractions (potassium is not assessed because of its environmental abundance and low toxicity).
For potassium trifluorozincate the base set data are available, including a respiration inhibition test with activated sludge. In addition, a reproduction test with daphnia and a 14-day prolonged fish test were conducted as part of a new chemical substance notification in China.
Short-term.
A GLP-compliant guideline study is available for the short-term toxicity in fish (D. rerio). In this limit test a 96-h LC50 value of >4.6 mg/L is determined , which is equivalent to >1.87 mg zinc/L and >1.63 mg fluoride/L based on the molecular weight fractions for zinc and fluoride, respectively.
Another GLP-compliant guideline study is available for the short-term toxicity in fish (Chinese Rare Minnow). In this study the 96-h LC50 value of 9.22 mg/L (nominal) is defined.
A GLP-compliant guideline study is available for the short-term toxicity in aquatic invertebrates (D. magna). In this mobilization study a 48-h EC50 value of 7.3 mg/L is determined , which is equivalent to 2.97 mg zinc/L and 2.58 mg fluoride/L based on the molecular weight fractions for zinc and fluoride of 40.7% and 35.4%, respectively.
A GLP-compliant guideline study is available for the toxicity in alga (P. subcapitata). In this study 72-h EC50 values for growth rate and yield are determined at 2.6 mg/L and 1.44 mg/L, respectively. These effect values are equivalent to 1.06 and 0.23 mg zinc/L and 0.92 and 0.20 mg fluoride/L based on the molecular weight fractions for zinc and fluoride of 40.7% and 35.4%, respectively.
A GLP-compliant guideline study is available for the toxicity in microorganisms. In this respiration inhibition study with activated sludge a 3-h EC50 value of 130 mg/L is determined, which is equivalent to 53 mg zinc/L and 46 mg fluoride/L based on the molecular weight fractions for zinc and fluoride of 40.7% and 35.4%, respectively.
Long-term
A GLP-compliant guideline study is available for the long-term toxicity in aquatic invertebrates (D. magna). In this reproduction study, a 21-day NOEC value of 0.059 mg/L (nominal concentration) is determined which is equivalent to 0.024 mg zinc/L and 0.021 mg fluoride/L.
In the study of growth inhibition of the algae species Pseudokirchneriella subcapitata performed by ECT Oekotoxicologie (2012), a 72-h NOErC of 0.568 mg/L (measured concentration). This value is equivalent to 0.23 mg zinc/L and 0.20 mg fluoride/L.
A GLP-compliant guideline study is available for the 14-day toxicity in fish (Gobiocypris rarus). In this study, a 14-day NOEC value of 0.850 mg/L (nominal concentration). It should be noted however that the 14-day prolonged fish test is not considered as a chronic test because the sensitive life-stages (juveniles, eggs, larvae) are not exposed. The test is in fact a prolonged acute study with fish mortality as the major endpoint examined.
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