Registration Dossier
Registration Dossier
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EC number: 909-701-4 | CAS number: -
Toxicity to soil microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
By analogy with one of its constituent (i.e. cerium dioxide), reaction mass of cerium dioxide and lanthanum oxide and lanthanum fluoride should not show any adverse effect on soil micro-organisms.
Key value for chemical safety assessment
Additional information
No data is available on the reaction mass. Based on the physico-chemical, environmental and ecotoxicological data available on both the reaction mass and its constituents, the substances show highly similar intrinsic properties. Therefore, a read-across with constituents when data are not available on the reaction mass appears fully relevant.
One experimental study, scored as Klimisch 2 and selected as a key study, is available on cerium dioxide (Muttzall & Hanstveit, 1996). It reveals that cerium dioxide is not harmful to soil micro-organsisms. This result can be used to conclude on the toxicity of reaction mass of cerium dioxide and lanthanum oxide and lanthanum fluoride to soil micro-organisms without launching further tests
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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