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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Short-term toxicity to fish

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Administrative data

Link to relevant study record(s)

Description of key information

The 96-hour LL50 (Oncorhynchus mykiss) of reaction mass of cerium dioxide and lanthanum oxide and lanthanum fluoride is > 100 mg/L; revealing it is not harmful for the fish species tested. 

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 96h-LL50 > 100 mg/L and revealing that the reaction mass is not harmful to Oncorhynchus mykiss (Bätscher, 2008).

One experimental study, scored as Klimisch 2 (Bazzon, 2000), is also available on cerium dioxide and lanthanum oxide and gives consistent results on Brachydanio rerio. The data on these constituents were thus selecting as supporting studies.