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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 201-368-7 | CAS number: 81-64-1
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Within 28 days a degradation rate of 7 % was determined. The test item is considered to be "Not Readily Biodegradable".
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
To test for its ready biodegradability potential, the substance was incubated for 28 days in continuously stirred 250 ml closed flask (two replicates) in the dark with an inoculum of mixed population of aquatic microorganisms (activated sludge) from domestic wastewater treatment plants. In this assay, biodegradation was estimated by biological oxygen demand (BOD) over time. BOD was determined daily measuring the drop in pressure in the automated respirometer flasks. The incubation temperature was 22 ± 1 °C, pH was 7.3 - 8.9. The concentration of innoculum was 30 mg /L and the one of test substance was 100 mg/L. Degradation was calculated by substracting the amount BOD in the negative (innoculum only) control from that in the test material or positive control at any given time point and divided by the thereotical oxygen demand (ThOD). The 28-day degradation was 7 % and for the positive control (with reference substance benzoic acid, sodium salt) the biodegrdation was 86 % after 14 days. In conclusion 1,4-dihydroxyanthraquinone is not readily biodegradable.
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.
