Registration Dossier
Registration Dossier
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EC number: 262-553-6 | CAS number: 60996-20-5
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
Two reliable acute/chronic toxicity studies (Klimisch 1, GLP) for the algal species Pseudokirchneriella subcapitata are available. The studies have been conducted with two different batches of aluminium potassium fluoride: Nocolok Flux and Hot melt PAF. The 72-h EC50 values for growth rate were 33.5 and 12.7 mg/l, respectively. The 72 hr NOErC values were reported to be 11 and 4.3 mg/l , respectively. The lowest values, ErC50 of 12.7 mg/l and NOErC of 4.3 mg/l will be used in the assessment.
Key value for chemical safety assessment
- EC50 for freshwater algae:
- 12.7 mg/L
- EC10 or NOEC for freshwater algae:
- 4.3 mg/L
Additional information
Since no toxicity study in algae is available for potassium cryolite, the results from the structural analogue multiconstituent aluminium potassium fluoride are used instead (for details see Read-across justification as attached in section 13).
Two reliable acute/chronic toxicity studies (Klimisch 1, GLP) for the algal species Pseudokirchneriella subcapitata are available (ECT Oekotoxikologie, 2012a and b). The studies have been conducted with two different batches of aluminium potassium fluoride: Nocolok Flux and Hot melt PAF. The 72-h EC50 values for growth rate were 33.5 and 12.7 mg/l, respectively. The 72 hr NOErC values were reported to be 11 and 4.3 mg/l, respectively. The lowest observed values, ErC50 of 12.7 mg/l and NOErC of 4.3 mg/l will be used in the assessment.
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