Registration Dossier
Registration Dossier
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EC number: 701-234-2 | CAS number: 18402-84-1
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:
- 2009-04-17 to 2009-09-14
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- flask method
- Partition coefficient type:
- octanol-water
- Analytical method:
- high-performance liquid chromatography
- Key result
- Type:
- log Pow
- Partition coefficient:
- 3.45
- Temp.:
- 24 °C
- pH:
- 5.8
- Conclusions:
- The log Pow of the test item is 3.45 at 24 °C.
- Executive summary:
The log Pow of the test item was determined by shake flask method with HPLC analysis according to OECD 107. The log Pow is 3.45 at 24 °C.
Reference
Table 1 summarizes phase preparations for the determination of n-octanol/water partition coefficient of the test item and Table 2 results of the determination.
Table 1: Phase preparation
Vessel |
Replicate |
Vol. of test substance stock solution (mL) |
Pre-saturated water with n-octanol used (mL) |
pH |
Volume ratio (n-octanol/water) |
Temperature observed (°C) |
1 |
1 |
15 |
15 |
5.80 |
1:1 |
24 |
2 |
2 |
15 |
15 |
5.80 |
1:1 |
|
3 |
1 |
20 |
10 |
5.80 |
2:1 |
|
4 |
2 |
20 |
10 |
5.80 |
2:1 |
|
5 |
1 |
10 |
20 |
5.80 |
1:2 |
|
6 |
2 |
10 |
20 |
5.80 |
1:2 |
Table 2: Results for n-octanol/water partition coefficient determinations of the test item
Volume ratio (n-octanol:water) |
Vessel |
Phase |
Dilution factor |
POW |
Log POW |
1:1 |
1 |
Octanol |
2020 |
2745.29 |
3.44 |
Water |
1 |
||||
2 |
Octanol |
2020 |
2708.64 |
3.43 |
|
Water |
1 |
||||
2:1 |
3 |
Octanol |
2020 |
2688.42 |
3.43 |
Water |
1 |
||||
4 |
Octanol |
2020 |
2923.81 |
3.47 |
|
Water |
1 |
||||
1:2 |
5 |
Octanol |
2020 |
3131.67 |
3.50 |
Water |
1 |
||||
6 |
Octanol |
2020 |
2765.87 |
3.44 |
|
Water |
1 |
||||
Mean |
3.45 ± 0.02 |
||||
Description of key information
The log Pow of the test item is 3.45 at 24 °C.
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 3.45
- at the temperature of:
- 24 °C
Additional information
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