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EC number: 247-426-5
CAS number: 26040-51-7
Determination of the Partition Coefficient (Pow). Mean of 3 single
The partition coefficient (Pow) of the substance was determined
according to the HPLC method at 40 °C. In order to comply with the
guideline OECD 117 and considering environmental relevance, pH 6 was
chosen . The reference Pow-values in the OECD-guideline presumably refer
to 25 °C. Even though the column temperature was 40 °C, this temperature
is without influence on the result of the determination. The calibration
was done referring to Pow-values of reference substances determined at
The adsorption coefficient of the substance determined by HPLC was log
Pow = 10.2.
No calibration substance with a Pow-value above the value for the main
signal of the substance was available. For this reason the results for
this signal was extrapolated.
Although the determined value does not exactly meet the range of
application of the test guideline (1.9 – 8.3), we consider the value as
valid (measurement uncertainty +/- 0.5 log units).
The partition coefficient of the substance determined by HPLC was log Pow = 10.2 at 25°C.
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