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EC number: 700-786-1 | 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
Partition coefficient
Administrative data
Link to relevant study record(s)
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 117 (Partition Coefficient (n-octanol / water), HPLC Method)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- HPLC method
- Partition coefficient type:
- octanol-water
- Type:
- log Pow
- Partition coefficient:
- >= 2 - <= 4.6
- Remarks on result:
- other: see details on results section
- Details on results:
- The octanol/water partitions coefficients (log Pow) of Sopholiance S are :
- Log P = 2.0 for product D (mean of two determinations)
- Log P = 2.9 for product C (mean of two determinations)
- Log P = 3.4 for product B (mean of two determinations)
- Log P = 3.8 for product A’(mean of two determinations)
- Log P = 4.6 for product A (mean of two determinations) - Conclusions:
- The octanol/water partitions coefficients (log Pow) of Sopholiance S are :
- Log P = 2.0 for product D (mean of two determinations)
- Log P = 2.9 for product C (mean of two determinations)
- Log P = 3.4 for product B (mean of two determinations)
- Log P = 3.8 for product A’(mean of two determinations)
- Log P = 4.6 for product A (mean of two determinations) - Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2019
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 117 (Partition Coefficient (n-octanol / water), HPLC Method)
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- HPLC method
- Partition coefficient type:
- octanol-water
- Analytical method:
- high-performance liquid chromatography
- Type:
- log Pow
- Partition coefficient:
- >= 3.9 - <= 5.4
- Temp.:
- 25 °C
- Remarks on result:
- other: pH not measured
- Details on results:
- In the conditions of the test, the chromatograms of the test item show six peaks with relative peak areas of 11.1%, 4.2%, 13.3%, 54.1%, 5.5% and 11.8%. These peaks correspond respectively to partition coefficients (Log Pow) of 3.9, 4.0, 4.4, 4.6, 4.7 and 5.4. The determination was performed at 25 °C (temperature of the column) but the values obtained can be considered to represent the values at an unspecified, probably ambient temperature since no mention is made in the guidelines of the temperature at which the tabulated reference substances log Kow values were determined. Log Kow values of the test and reference substances are assumed to vary with temperature in the same way.
- Conclusions:
- In the conditions of the test, the chromatograms of Freeze dried Sopholiance show six peaks at average retention times of: 7.89 minutes (11.1% relative peak area), corresponding to a partition coefficient (log value) of 3.9, 8.49 minutes (4.2% relative peak area), corresponding to a partition coefficient (log value) of 4.0, 10.49 minutes (13.3% relative peak area), corresponding to a partition coefficient (log value) of 4.4, 11.92 minutes (54.1% relative peak area), corresponding to a partition coefficient (log value) of 4.6, 12.77 minutes (5.5% relative peak area), corresponding to a partition coefficient (log value) of 4.7 and 18.89 minutes (11.8% relative peak area), corresponding to a partition coefficient (log value) of 5.4.
Therefore: Partition coefficients n-octanol/water of the constituents of Freeze dried Sopholiance:
log Pow = 3.9, 4.0, 4.4, 4.6, 4.7 and 5.4
Referenceopen allclose all
Test item n-octanol/water partition coefficient results for first run
Test item |
Retention Time(min) |
Value of the Capacity factor k |
Value of log k |
Value of log P |
Product D |
8.007 |
0.639 |
-0.194 |
2.0 |
Product C |
10.237 |
1.096 |
0.040 |
2.9 |
Product B |
12.200 |
1.497 |
0.175 |
3.4 |
Product A’ |
14.357 |
1.939 |
0.288 |
3.8 |
Product A |
19.500 |
2.992 |
0.476 |
4.6 |
Test item n-octanol/water partition coefficient results for second run
Test item |
Retention Time(min) |
Value of the Capacity factor k |
Value of log k |
Value of log P |
Product D |
8.014 |
0.641 |
-0.193 |
2.0 |
Product C |
10.290 |
1.106 |
0.044 |
2.9 |
Product B |
12.274 |
1.513 |
0.180 |
3.4 |
Product A’ |
14.454 |
1.959 |
0.292 |
3.8 |
Product A |
19.647 |
3.022 |
0.480 |
4.6 |
The log Kow values are reported correctly in the first paragraph of section 5 and in appendix 1 of the report, e.g. 3.9, 4.0, 4.4, 4.6, 4.7 and 5.4.
However, in other parts of the report the log Kow value of 4.0 corresponind to the second peak has been incorrectly typed as 4.2.
Description of key information
The partition coefficient n-octanol/water of the registered substance was determined by the reverse phase HPLC method according to OECD Guidelines, Method 117. This method is appropriate for UVCB or multi-component substance as individual constituents / groups of constituents may be resolved / partially resolved into separate peaks. Two studies are available, Processium 2012 (supporting study) and Dutriez 2019 (key study), which resulted in log Kow ranges of 2.0-4.6 and 3.9-5.4 respectively.
The first study (Processium 2012) is a supporting study because it was not performed under GLP and the report does not included copies of the HPLC chromatograms.
In contrast, the Dutriez 2019 study was performed according to GLP, includes copies of the HLPC chromatograms and gives measured log Kow values that are closer to those predicted by Kowwin (v1.68) for the four main constituents of the registered substance (predicted values = 4.93, 5.33, 5.47 and 5.61). In the conditions of the test, the chromatograms of the test item show six peaks with relative peak areas of 11.1%, 4.2%, 13.3%, 54.1%, 5.5% and 11.8%. These peaks correspond respectively to partition coefficients (Log Pow) of 3.9, 4.0, 4.4, 4.6, 4.7 and 5.4. The determination was performed at 25 °C (temperature of the column) but the values obtained can be considered to represent the values at an unspecified, probably ambient temperature since no mention is made in the guidelines of the temperature at which the tabulated reference substances log Kow values were determined. Log Kow values of the test and reference substances are assumed to vary with temperature in the same way.
For the purpose of the environmental risk assessment, a whole substance approach is being used. A log Kow value of 4.6 has been selected as the key value because it corresponds both to the weighted average [e.g. 3.9(*0.11) + 4.0(*0.042) + 4.4(*0.133) + 4.6(*0.541) + 4.7(*0.055) + 5.4(*0.118) = 4.57] and the value of the most abundant peak in the key study (Dutriez, 2019).
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 4.6
Additional information
For the purposes of classification and labelling, the substance is considered to have bioaccumulative potential since ~ 89% w/w of the substance has a log Kow ≥ 4. For the purpose of the PBT assessment, the substance is considered to contain some constituents that are potential B based on three peaks in the logKow determination being >4.5.
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.
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