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EC number: 500-051-3
CAS number: 26780-96-1
The adsorption coefficient (Koc) of '1,2-dihydro-2,4-trimethylquinoline, oligomers' was investigated by using HPLC method according to OECD guideline 121 at environmentally relevant pH 6.3 and 25°C. The results are log Koc = 3.57 (15.2 area % of the test item), and log Koc > 4.09 (84.8 area % of the test item) (Currenta 2010).
The test item '1,2-dihydro-2,4-trimethylquinoline, oligomers' is a
complex reaction mass with partially undefined composition (UVCB). The
chromatogram of the test item shows 20 resolved peaks corresponding to
20 fractions (main and minor components). The reference substances used
in this experiment had a range of log Koc up to 4.09.
As a worst-case assumption, the lowest log Koc of 3.57 is used for
further exposure assessment of PNEC in sediment and soil using EPM
method. According to the classification scheme of Swann et al. (1983)
the experimentally determined log Koc (mostly above 4.09) indicates a
high sorption potential to soil and sediment and suggests a slow
migration potential to ground water.
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