Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
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.
Oxidising properties
Administrative data
Link to relevant study record(s)
Description of key information
Test waived: inorganic substance, absence of structural alerts (expert judgement, based on IUCLID 4.23: chemical and mineralogical composition of a representative UVCB).
Key value for chemical safety assessment
- Oxidising properties:
- no
Additional information
As of IUCLID 4.23, the studied six (6) copper scale and dross sample contains 23.6- 86.8% copper. Zinc and lead contents ranges from below detection limits to 19.1 and 1.6%, correspondingly.
The mineral composition varies, but most samples consist mainly of copper, in some samples alloyed by zinc or aluminium, and copper oxides, cuprite and tenorite. Zincite is present in two samples.
In lead –bearing samples, lead is carried completely by metallic lead or mainly by metallic lead (61.5%), amorphous lead glass (32.1%) and lead oxides (6.3%).
The UVCB thus contain metal oxides, which fall into category likely to exhibit oxidising properties. Also granulometry of some scales exhibit fine powder structures (IUCLID 4.5). However, TG analysis under air flux on a representative sample containing ca. 50% oxide forms, showed that the sample itself oxidized at 280°C (first reaction, exothermic with mass increase -see IUCLID 4.12).
Justification for classification or non-classification
Expert judgement concluding on "non oxidiser" is confirmed by experience in handling and use.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
