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EC number: 701-218-5
CAS number: -
The log Koc of 2 was measured at an environmentally relevant pH-value of
6.3 and a calibration temperature of 40 °C.
The adsorption coefficient (log Koc) of the test item is 2 at pH
6.3 estimated by OECD Guideline 121 (Estimation of the Adsorption
Coefficient (Koc) on Soil and on Sewage Sludge using High Performance
Liquid Chromatography (HPLC) (Currenta, 2009).
The measured KOC-value of the substance is 100 at pH 6.3 determined by OECD Guideline 121 (Estimation of the Adsorption Coefficient (Koc) on Soil and on Sewage Sludge using High Performance Liquid Chromatography (HPLC) (Currenta, 2009).
The adsorption coefficient (Koc) of the substance was determined
according to the HPLC method at 40 °C. In order to comply with the
guideline OECD 121 and considering environmental relevance, pH 6 was
chosen as pH value for the buffer. The reference Koc- 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 Koc-
values of reference substances determined at 25 °C. The HPLC
chromatogram of the substance showed a resolved band of thirteen signals
(main and minor components). No reference substance with a Koc- value
below the value for the signal at RT = 1.6 min. (component 1) of the
test item was available. For this reason the result for the signal of
component 1 was extrapolated. Although the determined value does not
exactly meet the range of application of the test guideline (1,3-5), we
consider the value as valid (measurement uncertainty +/- 0,5 log units).
For adsorption coefficient of the substance follows: Adsorption
coefficient of all peaks of the substance determined by HPLC, calculated
with area % and their correspondence Log Koc = 2.0 (100 area % of the
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