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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 203-765-0 | CAS number: 110-41-8
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Ready biodegradable. The test substance exceeded the pass level of 60% within 28 days in two ready biodegradability tests and the 10-day window criterion was met in the key study.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
The test substance was assessed for ready biodegradation according to OECD guideline 301 F and was found to be readily biodegradable. It achieved > 60% biodegradation within the 28d test period (actual 68% after 22 days). The biodegradation reached 10 % on day 2 (start of the 10 -day window) and reached 63% on day 12 (end of the 10 day window), thus fulfilling the 10 day window. As suggested in the OECD 301F method, the toxicity of the test material for the inoculum was checked. The curves obtained with aniline alone (reference material) and with the test substance plus aniline showed no toxic effect of the test substance on the micro-organisms at the test concentration of 100mg/L. This concentration can be considered as a NOEC for toxicity to STP microorganisms.
In a supporting study, the test material was assessed for ready biodegradation according to OECD guideline 301B, modified with the use of sealed vessels. The test material exceeded the pass level of 60% theoretical carbon dioxide within 28 days but failed the 10-day window criterion.
Realising that ready biodegradability tests may sometimes fail because of the stringent test conditions, it is generally accepted that positive test results supersede negative test results. Thus 2 -methylundecanal is regarded as readily biodegradable based on the key study.
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.
