Registration Dossier
Registration Dossier
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EC number: 700-725-9 | CAS number: -
Partition coefficient
Administrative data
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- other: Basic data given: comparable to guidelines/standards
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 011
- Report date:
- 2011
Materials and methods
- Principles of method if other than guideline:
- Estimation by quotient of the solubility in n-octanol and in water.
- Partition coefficient type:
- octanol-water
Test material
- Reference substance name:
- Saponification and oxidation product of carnauba wax with acidic sodium dichromate solution esterified with 1-methyl-1,3-propanediol and subsequent saponification with calcium dihydroxide
- EC Number:
- 700-725-9
- IUPAC Name:
- Saponification and oxidation product of carnauba wax with acidic sodium dichromate solution esterified with 1-methyl-1,3-propanediol and subsequent saponification with calcium dihydroxide
- Details on test material:
- Test substance: C-Wax Type OP
Purity: 99.5-100% (w/w)
Constituent 1
Study design
- Analytical method:
- other: weighing of dry residue
Results and discussion
Partition coefficient
- Type:
- log Pow
- Partition coefficient:
- 1.9
- Temp.:
- 20 °C
- Remarks on result:
- other: pH not given
- Details on results:
- Due to the poor solubility of the test substance in water as well as in n-octanol the shake-flask method could not be applied. There is no analytical method available to determine low concentrations of the test substance. The HPLC method according to OECD guideline 117 is also not applicable since the test substance is not soluble in appropriate solvents.
Therefore the partition coefficient was estimated as quotient of the solubility in n-octanol and in water.
Any other information on results incl. tables
Result:
n-Octanol solubility:
Flask No. |
Equilibration time at |
Content of test [mg/L] |
1 2 |
72 |
496 |
mean |
-- |
514 |
Water solubility:
Flask No. |
Equilibration time at [h] |
Content of test |
1 2 |
72 |
9 |
mean |
--- |
7 |
Log Pow range:
Log (496/9) = 1.7
Log (496/4) = 2.1
Log (532/9) = 1.8
Log (532/4) = 2.1
Mean Log Pow= 1.9
Applicant's summary and conclusion
- Conclusions:
- The test substance has a log Pow of 1.9.
- Executive summary:
The partition coefficient of the test substance was estimated as quotient of the solubility in n-octanol and in water, as its solubility is too low for other log Pow determinations. The test substance has a log Pow of 1.9.
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