Registration Dossier
Registration Dossier
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EC number: 203-756-1 | CAS number: 110-31-6
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
log Koc > 5.63 (OECD 121)
Key value for chemical safety assessment
Additional information
One key study is available investigating the adsorption behaviour of the test substance Amides, C16 and C18-C20 (even numbered, unsaturated), N,N’-ethylenebis (Lammers, 2012). The study was performed in accordance to OECD 121. Due to the low water solubility of the test substance, in the chromatogram of the test solution no test substance peak was observed. Under the same analytical conditions, the retention time of 4,4-DDT (log Koc = 5.63) was 7.25 minutes. Hence, it was concluded that the log Koc of test substance was > 5.63 (Koc > 4.27E05). This value indicates a high potential for adsorption.
Results were supported using KOCWIN Program (v2.00), log Koc values for the main components of the test substance were calculated, based on molecular conductivity index (MCI; Cuesta, 2013). With log Koc values of 7.89 - 9.95 the calculation supports the experimental study indicating a high potential for adsorption. This model has no universally accepted definition of the model domain. Additionally, a read across approach was applied using the structural analogue. Since Amides, C16 and C18-C20 (even numbered, unsaturated), N,N’-ethylenebis did not dissolve in (organic) solvents at sufficiently high levels, the adsorption coefficient could not be determined.
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