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EC number: 403-360-0 | CAS number: 42405-40-3 BONTRON E-84; E-84
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:
- other: The study was conducted in accordance with GLP. A full study report is available which includes a GLP compliance statement.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 998
- Report date:
- 1988
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.8 (Partition Coefficient)
- Version / remarks:
- 84/449/EEC
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- shake-flask method to: flask method
- Partition coefficient type:
- octanol-water
Test material
- Reference substance name:
- Bis(3,5-bis(1,1-dimethylethyl)-2-hydroxybenzoato-O1,O2)zinc
- EC Number:
- 403-360-0
- EC Name:
- Bis(3,5-bis(1,1-dimethylethyl)-2-hydroxybenzoato-O1,O2)zinc
- Cas Number:
- 42405-40-3
- Molecular formula:
- C30H42O6Zn
- IUPAC Name:
- bis(3,5-bis(1,1-dimethylethyl)-2-hydroxybenzoato-O1,O2)zinc
- Details on test material:
- - Physical state: White powder
- Analytical purity: Not stated
- Lot/batch No.: C-7672
- Expiration date of the lot/batch: Not stated
- Stability under test conditions: Considered stable
- Storage condition of test material: Brown screw capped bottle at room temperature
- Other:
Constituent 1
Study design
- Analytical method:
- other: UV-Visible spectrophotometry
Results and discussion
Partition coefficient
- Type:
- log Pow
- Partition coefficient:
- 2.32
- Temp.:
- 18 °C
- Details on results:
- The mean concentration of test substance in n-octanol test solution before partition was determined to be 2810.5 μg/ml
The test substance was not detected spectrophotometrically in either the aqueous or organic blank solutions
The average value of the partition coefficient from all determinations was
P = 210.3
log P = 2.32
The standard deviation from the mean of the individual P values was 26.15. The range of log P values obtained were within the repeatability criteria of ±0.3 log units
Any other information on results incl. tables
The study report is attached to provide full details and the various spectrophotometrical charts.
Applicant's summary and conclusion
- Conclusions:
- The log Pow is determined to be 2.32 at 18C
- Executive summary:
A known mass of test sample was dissolved in a 50ml sample of water saturated n-octanol. The test volume and an equal volume of n-octanol were shaken for 100 rotations in a 1L flask and each phase analyses by UV-visible spectrophotometetry. The concentration of test sample in each phase was compared to show the proportion of test sample in the organic phase to the concentration in the aqueous phase. The log Pow is determined to be 2.32 at 18C.
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