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EC number: 204-640-3 | CAS number: 123-66-0
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:
- 2015-02-18 - 2015-02-18
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 117 (Partition Coefficient (n-octanol / water), HPLC Method)
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.8 (Partition Coefficient - HPLC Method)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- HPLC method
- Partition coefficient type:
- octanol-water
- Analytical method:
- high-performance liquid chromatography
- Key result
- Type:
- log Pow
- Partition coefficient:
- ca. 2.96
- Temp.:
- 22.4 °C
- Remarks on result:
- not measured/tested
- Remarks:
- pH
- Conclusions:
- A log Pow of 2.96 was determined for the test item.
- Executive summary:
The test item has a partition coefficient log Pow of 2.96 at 22.4 °C as determined by HPLC method according to EU Method A.8, and OECD Test Guideline 117 (2004)
Reference
Table: Retention Times, Capacity Factors and Partition Coefficients
Test Item |
tR [min] |
k |
log k |
log Pow |
|
6.814 |
13.1 |
1.12 |
1st Calibration |
2nd Calibration |
|
6.813 |
13.1 |
1.12 |
2.96 +/- 0.09 2.72 to 3.21 (95 % CI) |
2.96 +/- 0.09 2.73 to 3.20 (95 % CI) |
|
Mean value |
6.814 |
13.1 |
1.12 |
2.96 |
|
tR : Retention time
k: Capacity factor test item
Pow: Partition Coefficient (n-octanol / water)
CI: Confidence Interval
Temperature:
The mean temperature of 22.4 °C was inside the ranges of 20 -25°C ± 1°C during the course of the study.
The signal to noise ratio was > 3
The HPLC void time (to) was determined by threefold injection of a solution of 5 mg/L NaNO3.
Serial no. |
To [min] |
1 |
0.481 |
2 |
0.482 |
3 |
0.484 |
MEAN |
0.482 |
Regression Line: The correlation coefficient r for both calibartions was >0.9
|
1st calibration |
2ndcalibration |
Slope |
2.336 |
2.333 |
Y-intercept |
0.3474 |
0.3508 |
r² |
0.9747 |
0.9757 |
r |
0.9873 |
0.9878 |
Description of key information
log Pow = 2.96
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 2.96
- at the temperature of:
- 22.4 °C
Additional information
The test item has a partition coefficient log Pow of 2.96 at 22.4 °C as determined by HPLC method according to EU Method A.8, and OECD Test Guideline 117 (2004)
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