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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 256-170-3 | CAS number: 44914-03-6
Partition coefficient
Administrative data
Link to relevant study record(s)
Description of key information
The partition coefficient n-octanol/water of 2-methylbutyl acrylate was determined to be 2.90 ± 0.05 at 20 °C using OECD 107 “Partition Coefficient (n-Octanol/water): Shake Flask Method” conducted under GLP.
Key value for chemical safety assessment
Additional information
The partition coefficient n-octanol/water of 2-MBA was measured according to OECD 107 “Partition Coefficient (n-octanol/water): Shake Flask Method” and was conducted under GLP. 2-MBA was shaken in octanol/water mixture ratios of 1:5, 1:10 and 1:20 at 20 °C for approximately 23 hours to allow equilibrium partition between the two phases. The aqueous and n-octanol phases were separated by centrifuging and transferred to individual vials. 2-MBA in octanol phase was analyzed using GC-MS, and 2-MBA in aqueous phase was analyzed using LC-MS/MS. The log Pow for 2-MBA was determined to be 2.90 ± 0.05. For read-across purposes, nBA has a comparable log Kow of 2.38 at 25 °C originating from a study report considered reliable with restrictions.
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.
