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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 425-240-7 | CAS number: -
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
According to REACH Annex VII, a screening test on biodegradation in water does not need to be conducted, as the substance is inorganic.
The test item is composed of zinc chloride, a zinc hexacyanocobaltate complex as well as tertiary butyl alcohol plus polypropylene glycol, whereas the parent substance completely dissociates in contact with water. The biodegradability of zinc chloride and zinc hexacyanocobaltate complex cannot be determined as they are purely inorganic and thus cannot serve as energy source for microorganisms. Solely physico-chemical processes (sorption to the sewage sludge) might cause their elimination during sewage treatment rather than biological processes.
The inorganic fraction (zinc chloride and the zinc hexacyanocobaltate complex) accounts for approximately 68 % (w/w) of the substance. Concluding, the majority of the substance cannot be degraded in a sewage treatment plant resulting in the most stringent classification as not readily biodegradable, even if the organic fraction was assumed to be completely degradable. A test on ready biodegradability would thus not result in new information.
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
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.
