Registration Dossier
Registration Dossier
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EC number: 236-124-9 | CAS number: 13177-41-8
Partition coefficient
Administrative data
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 021
- Report date:
- 2021
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 117 (Partition Coefficient (n-octanol / water), HPLC Method)
- Qualifier:
- according to guideline
- Guideline:
- other: Commission Regulation (EU) 2016/266 adopted 7 December 2015 amending Regula-tion EC No. 440/2008, Method A.24 “Partition Coefficient (N-OCTANOL/WATER), HIGH PERFORMANCELIQUID CHROMATOGRAPHY (HPLC) METHOD
- GLP compliance:
- no
- Type of method:
- HPLC method
- Partition coefficient type:
- octanol-water
Test material
- Reference substance name:
- Dimethyloctadecyl(3-sulphopropyl)ammonium hydroxide
- EC Number:
- 236-124-9
- EC Name:
- Dimethyloctadecyl(3-sulphopropyl)ammonium hydroxide
- Cas Number:
- 13177-41-8
- Molecular formula:
- C23H49NO3S
- IUPAC Name:
- dimethyl(octadecyl)(3-sulfopropyl)azanium hydroxide
- Test material form:
- solid
1
Study design
- Analytical method:
- high-performance liquid chromatography
Results and discussion
Partition coefficient
- Type:
- log Pow
- Partition coefficient:
- > 6.5
- Temp.:
- 25 °C
- pH:
- > 5 - < 6
- Details on results:
- The chromatogram of the test substance gave one peak with a retention time of 13.923 min (mean). As the retention time of the test substance (13.923 min) lay above the retention time of 4,4'-DDT (8.360 min) and so outside of the calibrated range, a log Pow could only be extrapolated. The calculated log POW of the test item is 6.8 ± 0.0.
Applicant's summary and conclusion
- Conclusions:
- The log Pow is reported with >6.5 at 25°C. The retention time of the test substance is outside the range of the calibration.
- Executive summary:
The study was performed using a HPLC with a C18 column. Seven reference items with different retention times and thiourea for the determination of the dead time were used to produce a calibration curve, since retention time on hydrophobic columns and POW are correlated.
The chromatogram of the test item Stearyl Sulfobetaine gave one peak with a retention time of 13.923 min (mean). As the retention time of the test item (13.923 min) lay above the retention time of 4,4'-DDT (8.360 min) and so outside of the calibrated range, a log Pow could only be extrapolated. The calculated log POW of the test item is 6.8 ± 0.0.
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