Registration Dossier
Registration Dossier
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EC number: 231-166-4 | CAS number: 7440-58-6
Endpoint summary
Administrative data
Description of key information
Additional information
- the lack of toxic effects shown in the available acute aquatic toxicity tests with HfO2 used for read-across: no observed effects in any of the tests for acute toxicity to algae, aquatic invertebrates and fish.
- the extremely low water solubility of Hf < 8 µg/L
- and its affinity to form complexes with organic matter (Kd values are reported for Hf metal, with a range of 1500 – 8500 L/kg: that show a strong affinity of the metal for particulate matter)
On the basis of annex XI of REACh regulation, the present endpoint could be waived based on:
These last two points make Hf not bioavailable to aquatic organisms ; it is not relevant to conduct a bioconcentration test, and not required for the dossier due to tonnage band.
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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