Registration Dossier
Registration Dossier
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EC number: 266-972-5 | CAS number: 67711-95-9 A complex combination of insoluble compounds which precipitate during copper electrolytic refining.
Carcinogenicity
Administrative data
Description of key information
- complex metal containing substance
- classification made based on CLP mixture toxicity rules
- solubility of metal constituents
Key value for chemical safety assessment
Justification for classification or non-classification
- Please refer to IUCLID section 13 or CSR Annex I for detailed MeClas printouts with the specified input concentrations and resulting classification. Please visit www.meclas.eu for more information about the tool. MeClas tool version used: 2.5
Carcinogenicity Cat 1A (Driven by NiSO4)
The classification derived is applicable to all types of copper slimes.
The tested sample is representative for a typical across industry (and worst case) copper slime, defined within the concentration ranges outlined under IUCLID section 1.2
See furthermore attached documents:
Additional information
The calculated classification via mixture toxicity rules resulted in “classification for carcinogenicity Category 1A”, triggered mainly by the presence of nickel (sulphate forms). Exposure routes to consider when deriving an effect level are therefore oral & inhalation.
Derived effect is "suspected human carcinogens", based on evidence from calculation method, and with additional considerations (WoE) on the likely exposure route(s) and bio availability/water solubility of the substance and read-across considerations to constituent Nickel.
These additional considerations are derived from key studies in
- IUCLID section 4.8 water solubility: demonstrated moderately to poor (water) solubility of the constituents. In particular Ni solubilization (at high loading of 5g/ml) achieved occasionally 306 mg/l (low soluble)
- IUCLID Section 4.5 particle size: particle size distribution of a worst case (sample was dried) show majority of particles less than 20 µm. This worst case demonstrates that there is likelihood of exposure via oral and inhalation routes when the material is dried
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