Registration Dossier
Registration Dossier
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EC number: 403-030-6 | CAS number: 137398-54-0 ROBAC AS/100
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
The adsorption coefficient (Koc) of the test material has been determined to be in the range log10Koc 5.49 to >5.63.
Key value for chemical safety assessment
- Koc at 20 °C:
- 427 000
Additional information
ADSORPTION COEFFICIENT
Method
The determination was carried out using the HPLC screening method, Method C19 of Commission Directive 2001/59/EC (which constitutes Annex V of Council Directive 67/548/EEC).
Results
The retention times, capacity factors and log10Kocvalues determined for the sample are shown in the table below:
Component |
Injection |
Retention Time (mins) |
Capacity Factor (K) |
log10K |
log10Koc |
Koc |
Trimer |
1 |
25.425 |
10.366 |
1.016 |
5.49 |
3.06 x 105 |
2 |
25.284 |
10.303 |
1.013 |
5.48 |
||
Tetramer |
1 |
43.370 |
18.388 |
1.265 |
>5.63 |
>4.27 x 105 |
2 |
42.924 |
18.188 |
1.260 |
>5.63 |
||
Pentamer |
1 |
77.681 |
33.726 |
1.528 |
>5.63 |
>4.27 x 105 |
2 |
76.760 |
33.314 |
1.523 |
>5.63 |
Conclusion
The adsorption coefficient (Koc) of the test material has been determined to be in the range 3.06 x 105to >4.27 x 105, log10Koc5.49 to >5.63.
[LogKoc: 5.63]
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