Registration Dossier
Registration Dossier
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EC number: 700-384-6 | CAS number: 82324-60-5
Partition coefficient
Administrative data
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2016
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- OECD107
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 016
- Report date:
- 2016
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method)
- GLP compliance:
- no
- Type of method:
- flask method
- Partition coefficient type:
- octanol-water
Test material
- Reference substance name:
- ammonium sodium bis(4-amino-3-nitrobenzene-1-sulfonate)
- EC Number:
- 700-384-6
- Cas Number:
- 82324-60-5
- Molecular formula:
- C6H5N2O5S.H4N C6H5N2O5S.Na
- IUPAC Name:
- ammonium sodium bis(4-amino-3-nitrobenzene-1-sulfonate)
- Test material form:
- solid: bulk
Constituent 1
- Specific details on test material used for the study:
- Purity: 97,5 % (w/w)
Study design
- Analytical method:
- other: UV/VIS spectroscopy
Results and discussion
Partition coefficient
- Type:
- log Pow
- Partition coefficient:
- -2.5
- Temp.:
- 23 °C
- pH:
- >= 7.6 - <= 8.2
- Details on results:
- A stock solution of the test substance in n-octanol saturated water was prepared. To 5 ml, 10 ml and 20 ml of the stock solution 10 ml of water saturated n-octanol were added. The two-phase system was shaken vigorously at room temperature (23 °C) for one hour. Subsequently the phases were separated by centrifugation for 20 min at 14500 rpm and the test substance concentration in each phase was determined by UV/VIS spectroscopy.
Stock solution: 763 mg/l
Applicant's summary and conclusion
- Conclusions:
- The test substance has a log Pow of -2.5 at 23°C.
- Executive summary:
The log Pow of the test substance was determined according OECD107. The log Pow at 23 °C is -2.5.
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