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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]
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