Registration Dossier
Registration Dossier
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EC number: 811-367-9 | CAS number: 11073-79-3
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Hazard for air
Hazard for terrestrial organisms
Hazard for predators
Additional information
In accordance with the ECHA Guidance R.10 (May 2008), the derivation of PNECs is required for the chemical safety assessment (CSA) of substances manufactured/imported/used in quantities from 10 t/a onwards. Thus, no PNECs have been derived for the REACH registration of Gadolinium zirconium oxide in the tonnage band 1-10 t/a (REACH Annex VII).
Conclusion on classification
Based on the acute aquatic toxicity substance data for algae (Pseudokirchneriella subcapitata, 72-h NOELR ≥ 100 mg/L) and crustaceans (Daphnia magna 48-h NOEL ≥ 100 mg/L), a classification for neither acute nor chronic aquatic hazards is warranted.
Furthermore, the substance is considered highly insoluble. The nominal test substance concentration was 100 mg/L in both test. The actual concentrations of measured Gd and Zr were both below the limit of quantification (LOQ = 1 µg/L) in the test according to OECD 201, and in the range of 10-20 µg/L for Gd and < LOQ for Zr in the OECD 202 test.
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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