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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 248-654-8 | CAS number: 27776-01-8
Endpoint summary
Administrative data
Description of key information
One ready biodegradability tests carried out according to OECD guidelines have been carried out. Based on these results, it can be concluded that benzyltoluene is not readily biodegradable.
The registered substance contains concentration > 0.1 % of a PBT/ vPvB compound. According to the Echa Guidance R11 related to the PBT/vPvB assessment, in that case, the registered substance has to be considered also as a PBT/vPvB substance.
To answer the CCH-D-2114527842-47-01/F about the persistency datagap in the Benzyltoluene dossier, the studies performed on the impurity (Dibenzyltoluene: CAS 53585-53-8) were added in section 5.2.2.
Additional information
Biotic degradation:
Various biodegradation studies demonstrate the Dibenzylbenzene, ar-methyl derivative is inherently biodegradable. An OECD 309 study was conducted with radiolabelled test substance using aerobic natural water with amended solids. The tests were performed at 12°C. The degradation of two relevant compounds of DBT were followed : o,m-DBT and o,o-DTPM and one relevant impurity. The half-life of DBT during the study was determined as 56.0 days for o,m-DBT, > 10,000 days for o,o-DTPM and 32.8 days for the relevant impurity (SFO model).
DBT exhibited moderate biodegradation in two out the three labels o,m-DBT and the relevant impurity, whereas the third label o,o-DTPM was stable with very little break down in the mineralization in surface water of the high dose concentration.
Degradation products were observed throughout the study in two out of the three labels. Unknown metabolites were detected in o,m-DBT and the relevant impurityand was tentatively analyzed by LC-MS/MS.
Based on this study, o,m-DBT can be considered as persistent and o,o-DTPM can be considered as persistent /very persistent.
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.
