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EC number: 451-620-7
CAS number: 352230-22-9
Adsorption / desorption: log Koc
6.0 (QSAR) for Constituent 1 and Constituent 2
A predicted log Koc of
6.0 at 20-25°C was determined for Constituents 1 and 2 of the submission
substance using a validated QSAR estimation method. Although, the
substance and the predictions are just outside the applicability domain
as stated in the QMRF, the results are considered to be reliable and are
used as weight of evidence to indicate that the adsorption potential of
the constituents of the submission substance is high.
An attempt was made to estimate
the adsorption coefficient of the substance using a High Performance
Liquid Chromatography (HPLC) in accordance with OECD Test Guideline 121
(Weissenfield 2004). Log Koc values of 3.2 to 5.3 were obtained for the
constituents of the substance. However, the results were disregarded
because the use of HPLC is considered not appropriate for silicon-based
substances due to possible interaction between the silicon compound and
the silica present in the column. In addition, none of the reference
substances used in the study contained silicon-type structures.
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