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EC number: 947-862-2 | CAS number: -
Partition coefficient
Administrative data
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 15 - 16 Nov 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2018
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 117 (Partition Coefficient (n-octanol / water), HPLC Method)
- Version / remarks:
- April 13, 2004
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- HPLC method
- Partition coefficient type:
- octanol-water
Test material
- Reference substance name:
- Fatty acids C8-18 (even numbered), mono- and diesters with sucrose
- EC Number:
- 947-862-2
- Molecular formula:
- not applicable, substance is UVCB
- IUPAC Name:
- Fatty acids C8-18 (even numbered), mono- and diesters with sucrose
- Test material form:
- solid: particulate/powder
Constituent 1
Study design
- Analytical method:
- high-performance liquid chromatography
Results and discussion
Partition coefficient
- Type:
- log Pow
- Partition coefficient:
- >= 1.9 - <= 6.6
- Temp.:
- 25 °C
- Remarks on result:
- other: pH not reported
- Remarks:
- 17 peaks were identified, the single results are reported in "Any other information on results incl. tables)
Any other information on results incl. tables
Calibration curve
The calibration curve obtained using the reference items was:
log Pow = 2.250 * log k + 1.925
r = 0.996
Results
Peak no. |
Test solution A log Pow (measured value) |
Test solution A Peak area (%) |
Test solution B log Pow (measured value) |
Test solution B Peak area (%) |
Average log Pow |
1 |
1.9 |
1.92 |
1.9 |
1.90 |
1.9 |
2 |
2.1 |
1.54 |
2.1 |
1.57 |
2.1 |
3 |
3.1 |
1.85 |
3.1 |
1.78 |
3.1 |
4 |
3.3 |
1.10 |
3.3 |
1.09 |
3.3 |
5 |
3.8 |
1.48 |
3.8 |
1.47 |
3.8 |
6 |
4.0 |
2.25 |
4.0 |
2.19 |
4.0 |
7 |
4.2 |
1.85 |
4.2 |
1.83 |
4.2 |
8 |
4.3 |
32.58 |
4.3 |
32.51 |
4.3 |
9 |
4.4 |
6.35 |
4.4 |
6.46 |
4.4 |
10 |
4.5 |
20.46 |
4.5 |
20.35 |
4.5 |
11 |
4.6 |
3.37 |
4.6 |
3.20 |
4.6 |
12 |
5.5 |
4.06 |
5.5 |
3.78 |
5.5 |
13 |
5.7 |
2.36 |
5.7 |
2.29 |
5.7 |
14 |
6.2 |
8.19 |
6.2 |
9.24 |
6.2 |
15 |
6.3 |
1.55 |
6.3 |
1.91 |
6.3 |
16 |
6.4 |
5.80 |
6.4 |
5.73 |
6.4 |
17 |
6.6 |
3.27 |
6.6 |
2.71 |
6.6 |
The capacity factor was calculated from the retention time of each peak of test item. The partition coefficient of each peak of test item was then calculated using the regression equation of regression line and was given as the average value of two measured values. Because the retention time of peak 15,peak 16 and peak 17 was longer than that of DDT (log Pow = 6.5), whose retention time was the maximum, the log Pow were recalculated by extrapolation.
It is judged that all of the test results are valid because the difference between two measured values of each peak was within ±0.1. The log Pow of the test item ranged from 1.9-6.6. The majority of the test item had a log Pow equal to or below 4.5.
The partition coefficient (log Pow) of peaks 1 to 10 (total peak area 71%) is≤4.5
The partition coefficient (log Pow) of peaks 11 to 17 (total peak area 29%) is >4.5
Applicant's summary and conclusion
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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