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EC number: 273-744-9 | CAS number: 69012-45-9 By-product produced in the rolling of copper wire either in a conventional rod mill or a continuous cast rod mill. Consists of metallic copper, cuprous oxide and cupric oxide.
Endpoint summary
Administrative data
Description of key information
- eye irritation/ eye damage: cat 2 H319 if Copper in oxide form is above 10% (CLP; under DSD, cut off is 20%)
- skin corrosion/skin irritation: not classified
Key value for chemical safety assessment
Skin irritation / corrosion
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Eye irritation
Endpoint conclusion
- Endpoint conclusion:
- adverse effect observed (irritating)
Respiratory irritation
Endpoint conclusion
- Endpoint conclusion:
- no adverse effect observed (not irritating)
Additional information
Results from calculated classification (using mixture toxicity rules) are supported (WoE) by additional consideration from physico-chemical properties of the UVCB substance.
Chemistry of the substance (see IUCLID section 4.23 chemical and mineralogical characterization) excludes presence of irritating/corroding constituents such as strong acid or bases. Substance is a solid, made of stones (see picture in IUCLID section 1.4 "sampling protocol") which particle size distribution (IUCLID section 4.5) for a WC sample (ie sample that was crushed and grinded prior to testing) allowed to exclude likelihood of inhalation exposure route. Water solubility (IUCLID section 4.8) furthermore demonstrated that substance is low or poorly soluble in water. pH of the substance once solubilised remains around pH7.
Effects on eye irritation: moderately irritating
Justification for classification or non-classification
Skin irritation/corrosion: not classified
Eye irritation:cat 2 H319 (triggered by Cu content in oxide form -for CLP cut off is 10%, for DSD cut off is 20%)
The classification derived is applicable to all types of copper scales.
The tested sample is representative for a worst case copper scale Grade 1, 2, 3 and Grade 4 , defined within the concentration ranges outlined under IUCLID section 1.2
Self-classification of the UVCB substance (IUCLID Section 2.1 & 2.2) was performed based on below outline:
1. Characterization
The material is accurately described from its elemental composition (typical concentrations and concentration ranges across production sites – IUCLID Section 1.2), and the specific speciation data (mineralogical information, hazard) obtained from a representative sample (IUCLID Section 4, in particular 4.23). This information is enough to initiate the classification process.
2. Classification by the Mixture Approach
The UVCB is treated as a complex metal containing substance with a number of discrete constituting compounds (metals, metal compounds, non-metal inorganic compounds). The hazard classifications of each compound are then factored into a combined classification of the UVCB as a whole. For health endpoints, UVCB classifications are based on the combined hazards of the compounds whereby additivity or key cut off levels, specified in look-up tables are used, depending on the endpoint and amount of information available for the constituting compounds. For environmental endpoints, additivity and/or summation algorithms are applied to quantitatively estimate the mixture’s toxicity to aquatic organisms. These concepts and rules are incorporated in easy to use IT tools, which can be used to classify the UVCB.
3. Bridging or Read-Across
(Eco)-toxicological data are not available for the specific UVCBs being evaluated. Considering the knowledge and variability in composition, read-across and bridging is done by using a "representative" mineralogical/speciation analysis" combined with the "worst case" metal concentration (across companies) as a basis for the classification of the UVCB substance (chemical and mineralogical surrogates with similar origin/production process and physical/chemical properties –see IUCLID 1.4 for information on Sampling procedure).
4. Eventual correction
No correction for (bio)availability was made
See furthermore attached documents: Arche CLP tool version June 2010; Incorporated to tool (or attached): how elemental composition is translated into Mineralogical composition relevant for classification (i.e. “ input sheets” and IUCLID 4.23)
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