Registration Dossier
Registration Dossier
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EC number: 234-373-8 | CAS number: 11129-15-0
Endpoint summary
Administrative data
Description of key information
Additional information
Calcium zirconium oxide is not classified for any environmental hazard. Therefore, no chemical safety assessment needs to be performed for this substance. In agreement with Column 2 of REACH Annex IX and X, toxicity testing with terrestrial organisms may be required when the outcome of the chemical safety assessment indicates the need for further investigation for this environmental compartment. However, since no chemical safety assessment needs to be performed, it is not considered necessary to fulfill these endpoint requirements. Moreover, for toxicity to terrestrial plants, in a supporting study (Ferrand et al., 2006), in which tomato and pea seedlings were exposed for 7 days to two different soils contaminated with either an insoluble zirconium compound (Zr(OH)4) or a soluble zirconium compound (zirconium acetate or zirconium dichloride oxide), no adverse effects were observed on plant growth. These findings (which are considered relevant for zirconium dioxide) further support the waiving of terrestrial toxicity tests. On the other hand, calcium, being an essential and internally regulated element, is not expected to cause any adverse effects either, especially when taking into account the limited amounts of calcium that may be released from calcium zirconium oxide in the environment (for results in water see Eidam, 2014, 2015) and may become bioavailable.
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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