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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 203-571-6 | CAS number: 108-31-6
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Maleic anhydride and maleic acid are readily biodegraded under aerobic conditions in sewage sludge, and are expected to be biodegraded in soil and water as well.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
The key study, a well-documented published study that meets basic scientific principles, shows that over 98% biodegradation was achieved by 4 hour, using activated sludge from a public wastewater treatment plant. Initial test material concentrations were 170 mg/liter in single material test, 129 mg/liter in mixture with other chemicals in process wastewater and test temperature was 25 -30 ºC.
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.
