Registration Dossier
Registration Dossier
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EC number: 231-626-4 | CAS number: 7659-86-1
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
The adsorption coefficient (Koc) on soli and on sewage sludge using high performance liquid chromatography (HPLC) was estimated according to OECD 121 and Directive2001/159/EC, Method C.19 for the test item 2-Ethylhexyl thioglycolate (batch number: 12.11.07G).
The test was conducted with mobile phase of 55 % methanol and 45 % HPLC water. Samples of the test item 2-Ethylhexyl thioglycolate were analysed threefold via HPLC on a cyanopropyl (CN-) column with DAD - detection. Calibration was performed using six reference items with known values of logKocfor soil and six for sewage sludge, each with a nominal concentration of 5 mg/L. Analysis of the reference items were performed once before and after analysis of test item, respectively. The dead time of the HPLC-system was determined threefold using 5 mg/L sodium nitrate.At the test conditions the adsorption coefficient of 2-Ethylhexyl thioglycolate was found to be log Koc soil = 3.26 and log Koc sewage sludge = 3.42. These values correspond to a Kocsoil = 1809 and Koc sewage sludge = 2642.According to the McCall classification scheme of soil mobility potential a Koc of 1809 would mean that 2-Ethylhexyl thioglycolate is low mobile in soil.
Key value for chemical safety assessment
- Koc at 20 °C:
- 1 809
Additional information
[LogKoc: 3.26]
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