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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 406-040-9 | CAS number: 125643-61-0
Endpoint summary
Administrative data
Description of key information
Additional information
Hydrolysis:
Butyl 3.5-bis(1.1-dimethylethyl)-4-hydroxybenzenepropanoate (CAS 52449-44-2) was investigated in accordance with Method C7 of Commission Directive 92/69/EEC (O´Connor, 2000). The substance was found to be stable against hydrolysis at pH 4 and pH 7 at 25 °C (half-life greater than 1 year). At pH 9 the half-life at 25 °C was estimated as 28.9 days with a rate constant of 0.000000278 s-1. Also Benzenepropanoic acid, 3,5 -bis(1,1 -dimethylethyl)-4 -hydroxy-2 -ethylhexylester (CAS 144429-84-5) was found to be stable against hydrolysis at pH 4 and pH 7 at 25 °C (half-life greater than 1 year). At pH 9 the half-life at 25 °C was estimated as 15.2 days with a rate constant of 0.000000528 s-1 (OECD Guideline 111, Woolley and Mullee, 2007).
Biodegradation:
Benzenepropanoic acid, 3,5 -bis(1,1 -dimethylethyl)-4 -hydroxy-C7 -9 branched alkyl esters (CAS 125643-61-0) is considered to be not readily biodegradable (EPIWIN prediction, Chemservice S.A., 2011). Butyl 3,5 -bis(1,1-dimethylehtyl)-4- hydroxybenzenepropanoate (CAS 52449-44-2) is neither readily (Mead, 2000) nor inherently biodegradable (Furukawa, 2001). Benzenepropanoic acid 3,5 -bis(1,1 -dimethylethyl)-4 -hydroxy-2 -ethylhexylester (CAS 144429-84-5) met the criteria for inherent and primary degradability conditions (Zhang, 2009).
Soil sorption:
Benzenepropanoic acid, 3,5 -bis(1,1-dimethylethyl)-4 -hydroxy-C7-9 branched alkyl esters (CAS 125643-61-0) was investigated in HPLC experiments at 40 °C (Walker and Mullee, 2007) and at 30 °C (Wolley and Mullee, 2006). The adsorption coefficients were measured as 4.08 and greater than 427000, respectively.
Additionally, the Koc of Butyl 3,5 -bis(1,1 -dimethylethyl)-4 -hydroxybenzenepropanoate (CAS 52449 -44 -2) and Benzenepropanoic acid, 3,4 -bis(1,1 -dimethylethyl)-4 -hydroxy-2 -ethylhexylester (CAS 144429 -84 -5) were determined by HPLC analysis. Koc values of 1.70 x 10E4 (logKoc of 4.23) (O´Connor, 2000) and greater than 4.27 x 10E5 (logKoc > 5.63) (Woolley and Mullee, 2007) were determined, respectively.
Aquatic bioaccumulation:
For Benzenepropanoic acid, 3,5 -bis(1,1-dimethylethyl)-4 -hydroxy-C7-9 branched alkyl esters (CAS 125643-61-0) a moderate potential to bioaccumulate in aquatic organisms was predicted by the QSAR Toolbox (Chemservice S.A., 2011), whereas only a slight bioaccumulation potential was found for the read-across substance Butyl 3,5 -bis(1,1 -dimethylethyl)-4 -hydroxybenzenepropanoate (CAS 52449-44-2) (Mino, 2002).
Terrestrial bioaccumulation:
In an earthworm study with Eisenia fetida it was reported that the substance Butyl 3,5 -bis(1,1 -dimethylethyl)-4 -hydroxybenzenepropanoate (CAS 52449-44-2) will not accumulate in the test species due to the fact that it will be degraded before before the accumulation of the test substance into the organisms (Schmidt, 2010).
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.
