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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 203-905-0 | CAS number: 111-76-2
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Results of ready biodegradation tests from reliable studies:
BOD20 (freshwater, non adapted) = 88% (BOD10=74%)
BOD28=92%
BOD28=73-77 (Closed bottle)
BOD28=74-75 (Modified Sturm)
BOD5 (freshwater) = 91%
BOD20 (freshwater) = 72%
BOD15 (freshwater) = 76%
BOD20 (saltwater, non adapted) = 75% (BOD10=64%)
BOD5 (freshwater, adapted) = 73%; BOD5 (freshwater, non adapted) = 31%
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
A number of biodegradation studies have been carried out using both adapted and unadapted innoculii and in both fresh and saltwater. The key study clearly indicates that 2 -butoxyethanol is readily biodegradable in freshwater with non adapted bacterial populations. Other studies support this conclusion and also provide evidence that adapted bacteria degrade 2 -butoxyethanol more rapidly than unadapted colonies. There is only a single study available in saltwater. This study suggested slightly slower degradation than in freshwater but still sufficiently rapidly that the substance can be regarded as readily biodegradable in salt water.
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.
