Registration Dossier
Registration Dossier
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EC number: 909-709-8 | CAS number: -
Endpoint summary
Administrative data
Description of key information
Terrestrial toxicity data available on the reaction mass of cerium dioxide and zirconium dioxide and its constituents are shown in the table below:
Endpoints |
Reaction mass |
Cerium dioxide (micrometric) |
Zirconium dioxide |
Acute toxicity to soil macro-organisms |
No data |
14d-NOEC (E. foetida) > 1000 mg/kg |
Waived |
Acute toxicity to terrestrial arthropods |
No data |
Waived based on the terrestrial data already available |
Waived |
Acute toxicity to terrestrial plants |
No data |
17/18d-NOEC (A. sativa,L. sativa,B. rapa) > 1000 mg/kg |
7d-NOEC (L. esculentum) >= 450 mg Zr/kg dw |
Acute toxicity to soil microorganisms |
No data |
28d-NOEC (carbon mineralising bacteria) > 1000 mg/kg |
Waived |
Toxicity to birds |
No data |
Waived based on a low bioaccumulation potential and on the absence of toxicity in mammalian tests |
|
Based on the already reported data showing similar physicochemical, environmental and ecotoxicological properties of the reaction mass and its constituents, read across with constituents when data are not available on the reaction mass appears fully relevant.
All studies regarding terrestrial toxicity can be waived for the reaction mass of cerium dioxide and zirconium dioxide.
In accordance with column 2 of REACH annex IX and X, toxicity testing in terrestrial organisms shall be proposed by the registrant if the results of the chemical safety assessment indicate the need to investigate further the effects of the substance. As the reaction mass of cerium dioxide and zirconium dioxide is not classified and consequently no chemical safety assessment needs to be conducted, there is currently no trigger for the performance of terrestrial toxicity tests.
The available studies on the separate constituents cerium dioxide and zirconium dioxide indicate no adverse effects in terrestrial organisms. These data can be considered as supporting information to the waivers for the reaction mass.
Additional information
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