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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 219-348-1 | CAS number: 2421-28-5
Biodegradation in water and sediment: simulation tests
Administrative data
Link to relevant study record(s)
Description of key information
According to Regulation (EC) No.1907/2006, Annexes IX and X, Column 2, further testing for ultimate biodegradation in surface water or sediment shall be proposed if the chemical safety assessment according to Annex 1 indicates the need to investigate further the degradation of the substance or its degradation products; additional testing need not be proposed if direct and indirect exposure to the relevant environmental compartment is unlikely. BTDA hydrolyses rapidly in water (half-life < 10 minutes); ultimate degradation is expected to occur in a timeframe of days to weeks (based on the timeframe predicted by BIOWIN 3). The chemical safety assessment did not indicate the need to investigate the degradation of BTDA; the risk characterisation ratios for surface water are below one. Therefore, in accordance with Annex I, the risks are considered controlled.
According to Regulation (EC) No.1907/2006, Annexes IX and X, Column 2, further testing for ultimate biodegradation in sediment need not be conducted if direct and indirect exposure to sediments is unlikely. The Koc for BTDA is 307.2; this value falls below the range of Koc values of 500-1000, below which substances are unlikely to adsorb to sediment. The chemical safety assessment did not indicate the need to investigate the degradation of BTDA; the risk characterisation ratios for sediment are below one. Therefore, in accordance with Annex I, the risks are considered controlled.
Key value for chemical safety assessment
Additional information
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.
