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EC number: 947-716-8 | CAS number: -
Partition coefficient
Administrative data
Link to relevant study record(s)
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 3 to 8 February 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 123 (Partition Coefficient (1-Octanol / Water), Slow-Stirring Method)
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- Staatliches Gewerbeaufsichtsamt Hildesheim
- Type of method:
- slow-stirring method
- Partition coefficient type:
- octanol-water
- Analytical method:
- high-performance liquid chromatography
- Key result
- Type:
- log Pow
- Partition coefficient:
- 5.662
- Temp.:
- 25 °C
- pH:
- 5.7
- Conclusions:
- A log Kow of 5.662 ± 0.007 at 25°C, pH 5.7 was determined for the test substance according to OECD 123.
- Executive summary:
The logKow of the test item was determined according to OECD 123 (2006) using a slow stirring method. The test was performed under GLP. The concentrations in both phases were analyzed via GC-MS after reaching equilibration state. The weighted average value of the partition coefficient (logKow) of the test item was determined to be 5.662 at 25 °C and pH 5.7.
Reference
Temperature measured hourly by a data logger
Sample |
Measured temperature [°C] |
||
Replicate 1 |
Replicate 2 |
Replicate 3 |
|
Min |
25.05 |
24.88 |
24.87 |
Max |
25.16 |
25.11 |
25.16 |
Mean |
25.13 |
25.07 |
25.11 |
SD ± |
0.02 |
0.04 |
0.05 |
Min = Minimum measured temperature
Max = Maximum measured temperature
SD = Standard deviation
pH-Values
Replicate |
Test start |
Test end |
Mean |
1 |
5.630 |
5.804 |
5.7 |
2 |
5.702 |
||
3 |
5.714 |
Partition coefficient results
Replicate number |
Test Duration [h] |
Measured concentration |
POW |
Log POW |
||||
in n-octanol [mg/L] |
in aq. Phase [mg/L] |
Single |
Mean |
SD ± |
CV |
|||
1 |
69.60 |
23529 |
0.0502 |
468554 |
5.67 |
5.64 |
0.07 |
1.30 |
74.62 |
22971 |
0.0669 |
343291 |
5.54 |
||||
93.29 |
21176 |
0.0451 |
469797 |
5.67 |
||||
98.29 |
21614 |
0.0434 |
497987 |
5.70 |
||||
2 |
69.60 |
23332 |
0.0539 |
432505 |
5.64 |
5.67 |
0.07 |
1.16 |
74.62 |
22906 |
0.0591 |
387844 |
5.59 |
||||
93.29 |
21242 |
0.0391 |
543443 |
5.74 |
||||
98.29 |
21852 |
0.0435 |
502464 |
5.70 |
||||
3 |
69.60 |
22030 |
0.0687 |
320771 |
5.51 |
5.71 |
0.13 |
2.36 |
74.62 |
21864 |
0.0359 |
609795 |
5.79 |
||||
93.29 |
20619 |
0.0355 |
581520 |
5.76 |
||||
98.29 |
21862 |
0.0368 |
594355 |
5.77 |
||||
Mean |
5.662 |
|
||||||
Weighted standard deviation |
0.007 |
|
||||||
Conclusions
The partition coefficient (n-octanol/water) (log POW) of the test substance was determined at test temperature of 25 ± 1 °C and at a mean pH value of 5.7 from three independent replicates (test vessels) with four sub-replicates (samples) to be 5.662 ± 0.007.
Description of key information
Log Kow: 5.662 ± 0.007 at 25°C, pH 5.7 (OECD 123, Slow-stirring Method)
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 5.662
- at the temperature of:
- 25 °C
Additional information
The logKow of the test item was determined according to OECD 123 (2006) using a slow stirring method. The test was performed under GLP. The concentrations in both phases were analyzed via GC-MS after reaching equilibration state. The weighted average value of the partition coefficient (logKow) of the test item was determined to be 5.662 at 25 °C and pH 5.7.
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