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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 203-910-8 | CAS number: 111-81-9
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
In 2009 a Klimisch 1 rated GLP guideline study on distribution of methyl undecylenate was conducted, testing the adsorption by activated sludge in aqueous environment. The results obtained by HPLC measurement reveal a log Koc in the range 2.6 to 3.5
Key value for chemical safety assessment
- Koc at 20 °C:
- 2 431
Additional information
In this study, methyl undecylenate contains four components. The results obtained by HPLC measurement reveal a log Koc in the range of 2.6 to 3.5
Computation of the log Koc of methyl undecylenate out of the 4 components identified is this study:
| Component | Min. | log Koc | Koc | % | Koc x (%/100) |
| 1 | 4.7 | 2.6 | 398.1 | 3.7 | 14.73 |
| 2 | 5.5 | 3.0 | 1000 | 6.2 | 62 |
| 3 | 6.4 | 3.3 | 1995.3 | 42.4 | 854.99 |
| 4 | 7.0 | 3.5 | 3162.3 | 47.7 | 1580.41 |
| Sum | 2431.13 |
Koc = 2431.13
Log Koc = 3.385
Taking into account the individual Koc data of the four components, in a weighted approach, taking into account the different percentages of the four components, for methyl undecylenate results a Koc of 2431.13, i.e. log Koc= 3.385.
[LogKoc: 3.385]
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.
