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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 200-618-2 | CAS number: 65-85-0
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Several non-guideline tests are available that investigate the biodegradability of the test substance under aerobic conditions. The outcome of the tests is indicative for rapid biodegradation in fresh water. Kohei (1985) finds 61-69% degradation (as BOD or DOC) over a priod of 80 hours, MITI (1979) reported 98% degradation (as TOC) over 14 days, Howard (1981) >94.5% (decrease of radioactivity) over 7 days and Freitag (1985) 65.4% (CO2 evolution) over 5 days at a concentration of 0.05 mg/L test substance.
In seawater the test substance degrades 10-80% (DOC removal) over a period of 8-28 days (Shimp 1987), but the test is performed without adding a specific inoculum to the water. Two tests with similarities to simulation testing are available (Junker 2009) that indicate that in a water sediment system the test substance degrades > 74.4% over a 8-day period. These studies are considered to be the key studies.
Several studies indicating that the test substance is completely biodegradable under anaerobic conditions are available (Birch, 1989; Uma, 2007;Nottingham, 1969; Kameya, 1995). The key study for anaerobic degradation (Birch, 1989) is performed according to the methods as described under OECD 311.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
Based on the large number of studies indicating a rapid and almost complete biodegrdataion, it can be concluded that the test substance is readily biodegradable. Although most tests do not provide information on the passing of the 10-day window, this is considered to be passed, because the overall test duration is in most tests shorter than 10 days.
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.
