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EC number: - | CAS number: -
Approximate solubility in n-octanol: <110 mg/L
Approximate solubility in water: >4.0E05 g/L
Approximate Pow: <2.8E-04
The mean peak areas obtained for the standard, stock and sample solutions are shown in the following two tables.
Table 3: Organic phase
Mean peak area
Standard 10.0 mg/L
Organic phase matrix blank
Table 4: Aqueous phase
Standard 507 mg/L
Standard 504 mg/L
Aqueous phase matrix blank
Stock solution A
Stock solution B
The total weights [mg] and analyzed concentration [mg/L] of the respective phases are shown in the following table.
Analyzed concentration [mg/L]2)
Analyzed concentration [mg/L]
pH of n-octanol saturated water: 6.3
pH of stock solution: 7.1
Temperature: 22.0 ± 0.5°C
1)From analysis of the stock solution
2)See discussion section
3)From analysis of the respective phase
The partition coefficient determined for each sample is shown in the following table.
Organic/aqueous volume ratio
Mean Pow : <8.85E-04
log10Pow : <-3.05
Pow standard deviation : 2.78E-06
The linearity of the detector response with respect to concentration was assessed over the nominal concentration range of 250 to 750 mg/L (aqueous) and 5 to 15 mg/L (organic). The results were satisfactory with a correlation coefficient (r) of 1.000 (aqueous) and 0.9985 (organic) being obtained.
Due to the low concentration within the organic samples a limit of detection was applied to organic samples 2 to 6 based on organic sample 1 which had the highest concentration determined. Therefore, the overall result was a less than value.
The stock solution was prepared in n-octanol saturated water in place of water saturated n-octanol. This was due to low solubility of the test item in the organic phase. This issue has been considered to have had a negligible impact on the overall result and has been considered to be more appropriate to obtain a more realistic partition coefficient value.
The partition coefficient of the test item has been determined to be less than 8.85E-04 at 22.0 ± 0.5 °C, log10Pow less than -3.05.
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