Registration Dossier
Registration Dossier
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EC number: 231-388-1 | CAS number: 7526-26-3
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:
- 2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.8 (Partition Coefficient)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 117 (Partition Coefficient (n-octanol / water), HPLC Method)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- HPLC method
- Partition coefficient type:
- octanol-water
- Analytical method:
- high-performance liquid chromatography
- Type:
- log Pow
- Partition coefficient:
- 2.8
- Temp.:
- 30 °C
- pH:
- 6.5
- Type:
- Pow
- Partition coefficient:
- 640
- Temp.:
- 30 °C
- pH:
- 6.5
- Details on results:
- Preliminary estimate: The logPow was calculated to be 2.95.
Definitive test: Testing was carried out at approximately neutral pH with the test item in a non-ionised form. The chromatography of the test item showed one sharp main peak with a well-defined and reproducible retention time. The HPLC method was therefore considered to be suitable for the purpose of the study. Based on the chromatographic data, the test item was considered to be stable during the test procedure. - Conclusions:
- logPow (at 30°C and pH of 6.5) = 2.8; Pow = 640
- Executive summary:
The partition coefficient of the test substance has been determined to be 2.8 (at 30 °C and ph of 6.5), POW = 640 by using the HPLC method in a GLP study (2012) according to OECD 117 and EU method A.8.
Reference
The retention times, capacity factor and log10POW value determined for the sample are shown in the following table:
| Injection | Retention time [min] | Mean retention time [min] | Capacity factor (k') | Log10k' | Log10POW |
| 1 | 15.593 | 15.556 | 8.006 | 0.903 | 2.8 |
| 2 | 15.520 |
POW = 640
Description of key information
The partition coefficient of the test substance has been determined to be 2.8 (at 30 °C and ph of 6.5), POW = 640 by using the HPLC method in a GLP study (2012) according to OECD 117 and EU method A.8.
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 2.8
- at the temperature of:
- 30 °C
Additional information
The key value was determined by using the HPLC method (EU Method A.8/OECD 117, 2012). As supporting information a calculation was performed with US-EPA software EPIWIN/KOWWIN v1.69, resulting in a logPOW of 2.95, which confirms the experimental result.
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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