Registration Dossier
Registration Dossier
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EC number: 239-763-1 | CAS number: 15680-42-9
Endpoint summary
Administrative data
Description of key information
Data on all three trophic levels are available for the test substance. Short-term toxicity to fish and aquatic invertebrates showed no effects up to the limit of solubility. However, the toxicity study to aquatic algae showed after 72 h of exposure an ErC50 of 15.5 mg/L and an ErC10 of 6 mg/L. Therefore, the test substance is acutely harmful for aquatic algae. However, based on the EC10, the test substance is very likely chronically not harmful to aquatic algae. Therefore, a chronic classification is not necessary.
Additionally, the Activated Sludge Respiration Inhibition Test gave an ErC10 > 1000 mg/L after 3 h of incubation showing no effects on the toxicity to microorganisms. Therefore, the inhibition of the degradation activity of activated sludge is not anticipated when introduced to biological treatment plants in appropriate low concentrations.
Additional information
CAS 15680-42-9 was identified as nanomaterial. Considering this information, the behavior in aquatic media needs to be further investigated. In line with ECHA’s Appendix R7-1 for nanomaterials applicable to Chapter R7b a study according to OECD test guideline 318 was conducted to investigate the dispersion stability of the substance. This study resulted in mostly intermediate dispersion stabilities. Only high Ca concentrations resulted in lower stabilities below 10%.
Furthermore, as the test compound might release Cu ions in aquatic test systems a dissolution study is also proposed to investigate the potential Cu release. Further experimental results are dependent on these results and cannot be specified at this point in time. As soon as the results from these studies are available the dossier will be updated and the subsequent testing strategy evaluated.
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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