Registration Dossier
Registration Dossier
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EC number: 909-701-4 | CAS number: -
Toxicity to aquatic algae and cyanobacteria
Administrative data
Link to relevant study record(s)
Description of key information
The 72-hour EL50 (Scenedesmus subspicatus) of reaction mass of cerium dioxide and lanthanum oxide and lanthanum fluoride is > 100 mg/L based on the growth rate; revealing it is not harmful for the algae.
Key value for chemical safety assessment
Additional information
A GLP-compliant study, scored as Klimisch 1 and flagged as a key study, is available on the reaction mass; giving a 72h-EL50 > 100 mg/L and revealing that the reaction mass is not harmful to algae (Peither, 2009).
Two experimental studies, of reliability 2 (Bätscher, 2007) and 4 (Van Hoecke et al., 2009a) according to Klimisch, are also available on cerium dioxide and give consistent results with those obtained on the reaction mass. Data on this constituent were thus selected as supporting studies.
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