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Diss Factsheets
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EC number: - | CAS number: -
- Life Cycle description
- Uses advised against
- Endpoint summary
- Appearance / physical state / colour
- Melting point / freezing point
- Boiling point
- Density
- Particle size distribution (Granulometry)
- Vapour pressure
- Partition coefficient
- Water solubility
- Solubility in organic solvents / fat solubility
- Surface tension
- Flash point
- Auto flammability
- Flammability
- Explosiveness
- Oxidising properties
- Oxidation reduction potential
- Stability in organic solvents and identity of relevant degradation products
- Storage stability and reactivity towards container material
- Stability: thermal, sunlight, metals
- pH
- Dissociation constant
- Viscosity
- Additional physico-chemical information
- Additional physico-chemical properties of nanomaterials
- Nanomaterial agglomeration / aggregation
- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
- Nanomaterial porosity
- Nanomaterial pour density
- Nanomaterial photocatalytic activity
- Nanomaterial radical formation potential
- Nanomaterial catalytic activity
- Endpoint summary
- Stability
- Biodegradation
- Bioaccumulation
- Transport and distribution
- Environmental data
- Additional information on environmental fate and behaviour
- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
- Long-term toxicity to fish
- Short-term toxicity to aquatic invertebrates
- Long-term toxicity to aquatic invertebrates
- Toxicity to aquatic algae and cyanobacteria
- Toxicity to aquatic plants other than algae
- Toxicity to microorganisms
- Endocrine disrupter testing in aquatic vertebrates – in vivo
- Toxicity to other aquatic organisms
- Sediment toxicity
- Terrestrial toxicity
- Biological effects monitoring
- Biotransformation and kinetics
- Additional ecotoxological information
- Toxicological Summary
- Toxicokinetics, metabolism and distribution
- Acute Toxicity
- Irritation / corrosion
- Sensitisation
- Repeated dose toxicity
- Genetic toxicity
- Carcinogenicity
- Toxicity to reproduction
- Specific investigations
- Exposure related observations in humans
- Toxic effects on livestock and pets
- Additional toxicological data
![](https://echa.europa.eu/o/diss-blank-theme/images/factsheets/A-REACH/factsheet/print_physical-and-chemical-properties.png)
Partition coefficient
Administrative data
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- Testing was conducted between 16 May 2008 and 02 July 2008.
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Study conducted to GLP and in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not effect the quality of the relevant results.
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 008
- Report date:
- 2008
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.8 (Partition Coefficient)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- The work described was performed in compliance with UK GLP standards (Schedule 1, Good Laboratory Practice Regulations 1999 (SI 1999/3106 as amended by SI 2004/0994)).
- Type of method:
- shake-flask method to: flask method
- Partition coefficient type:
- octanol-water
Test material
Constituent 1
Study design
- Analytical method:
- photometric method
Results and discussion
Partition coefficient
- Type:
- log Pow
- Partition coefficient:
- < -2.82
- Temp.:
- 24.9 °C
- pH:
- 7
Any other information on results incl. tables
Preliminary estimate
Approximate solubility in n-octanol: <1.20
x 10-2 g/l
Approximate solubility in water: >10.2 g/l
Approximate Pow: <1.18 x 10 -3
Log10 Pow: <-2.93
Definitive test
The absorbance obtained for the standard, stock and sample solutions are shown in the following two tables:
Solution |
Absorbance |
Standard 5.05 mg/l |
0.13508 |
Standard 5.07 mg/l |
0.13106 |
Organic phase matrix blank |
None detected |
Sample 1 |
≤0.039209* |
Sample 2 |
<0.039209* |
Sample 3 |
<0.039209* |
Sample 4 |
<0.039209* |
Sample 5 |
<0.039209* |
Sample 6 |
<0.039209* |
Solution |
Absorbance |
Standard 10.1 mg/l |
0.23696 |
Standard 16.1 mg/l |
0.36283 |
Standard 20.1 mg/l |
0.42816 |
Standard 20.1 mg/l |
0.43168 |
Standard 24.1 mg/l |
0.50047 |
Standard 30.2 mg/l |
0.55823 |
Standard 40.2 mg/l |
0.65444 |
Aqueous phase matrix blank |
None detected |
Sample 1 |
0.42759 |
Sample 2 |
0.44116 |
Sample 3 |
0.43542 |
Sample 4 |
0.42616 |
Sample 5 |
0.43592 |
Sample 6 |
0.44174 |
Stock solution A |
0.42713 |
Stock solution B |
0.42511 |
* see Section 9.6
The total weights (mg) and analysed concentration (mg/l) of the respective phases are shown in the following table:
Sample Number |
Volume of water saturated n-octanol (ml) |
Volume of stock solution (ml) |
Total Weight (mg)* |
Organic Phase |
Aqueous Phase |
|||
Analysed Concentration (mg/l) |
Weight (mg)† |
Analysed Concentration (mg/l) |
Weight (mg)† |
pH |
||||
1 |
70 |
70 |
139 |
≤2.98 |
≤0.209 |
2.00 x 103 |
140 |
6.7 |
2 |
70 |
70 |
139 |
2.98 |
0.209 |
2.08 x 103 |
146 |
6.7 |
3 |
40 |
80 |
159 |
2.98 |
0.119 |
2.04 x 103 |
164 |
6.8 |
4 |
40 |
80 |
159 |
2.98 |
0.119 |
1.99 x 103 |
159 |
6.8 |
5 |
80 |
40 |
79.5 |
2.98 |
0.238 |
2.05 x 103 |
81.9 |
6.9 |
6 |
80 |
40 |
79.5 |
2.98 |
0.238 |
2.08 x 103 |
83.3 |
6.9 |
pH of n-octanol saturated
water: 6.9
pH of stock solution: 7.1
Temperature: 24.9 ± 0.5°C
The partition coefficient determined for each sample is shown in the following table:
Sample Number |
n-octanol/water Volume Ratio |
Partition Coefficient |
Log10 Pow |
Mean Partition Coefficient |
1 |
1:1 |
≤1.49 x 10-3 |
≤-2.83 |
≤1.49 x 10-3 |
2 |
1.43 x 10-3 |
-2.84 |
||
3 |
1:2 |
1.46 x 10-3 |
-2.84 |
1.50 x 10-3 |
4 |
1.50 x 10-3 |
-2.82 |
||
5 |
2:1 |
1.46 x 10-3 |
-2.84 |
1.46 x 10-3 |
6 |
1.43 x 10-3 |
-2.85 |
* From analysis of the stock solution
† From analysis of the respective phase
Mean Pow : 1.50 x 10-3 log10Pow : -2.82
Validation
The linearity of detector response with respect to concentration was assessed over the nominal concentration range of 0 to 10 mg/l for the organic solutions. This was satisfactory, with a correlation coefficient of 0.999 being obtained.
Discussion
Substances having a log10 Pow of greater than 3 are regarded as having the potential to bioaccumulate in the environment.
The test was carried out using unadjusted n-octanol saturated water, at ~ pH 7 (as recommended for salts).
No test material was detected in any of the organic samples. The limit value was taken for the sample with the highest baseline absorbance at the analytical wavelength (Sample 1).
Conclusion
The partition coefficient of the test material has been determined to be less than 1.50 x 10-3 at 24.9 ± 0.5°C, log10 Pow -2.82.
Applicant's summary and conclusion
- Conclusions:
- The partition coefficient of the test material has been determined to be less than 1.50 x 10-3 at 24.9 ± 0.5°C, log10 Pow <-2.82.
- Executive summary:
The determination for substance NDS-Li in project number 1307 -0447 was carried out using the shake-flask method, Method A8 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC). The partition coefficient of the test material has been determined to be less than 1.50 x 10-3 at 24.9 ± 0.5°C, log10 Pow
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
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