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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
Partition coefficient
Administrative data
Link to relevant study record(s)
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- From 13 July 2022 to 14 July 2022
- 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)
- Qualifier:
- according to guideline
- Guideline:
- other: Commission Regulation (EU) 2016/266 adopted 7 December 2015 amending Regulation EC No. 440/2008, Method A.24 “Partition Coefficient (N-OCTANOL/WATER), HIGH PERFORMANCE LIQUID CHROMATOGRAPHY (HPLC) METHOD
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- HPLC method
- Partition coefficient type:
- octanol-water
- Analytical method:
- high-performance liquid chromatography
- Key result
- Type:
- log Pow
- Partition coefficient:
- 0.3 - <= 1.3
- Temp.:
- 25 °C
- pH:
- 4
- Details on results:
- The chromatogram of the test item consists of four peaks. The retention time of the first two peaks lay below the retention time of thiourea, so no log POW could be calculated. With the calibration function log k versus log POW, the corresponding log POW values of the third and the fourth peak were determined with. Since the third peak elutes before the reference substance with the lowest log Pow, 2-Butanone (log POW = 0.3) and thus lies outside the calibration range, the log Pow can only be extrapolated. The log POW of the fourth peak could also be calculated and gave a log POW of 1.3.
Using the correlation log k / log POW, the log POW of the test item was as <0.3 – 1.3. - Conclusions:
- Variations in the retention times of reference items and test item are very small. Therefore a stable configuration of the HPLC-column can be assumed. The correlation log k/log POW is good: the coefficient of determination r2 was calculated with 0.9949. This value was considered as sufficiently high to use the calibration function for the determination of the log POW of the test item Kombucha.
The chromatogram of the test item consists of four peaks. The retention time of the first two peaks lay below the retention time of thiourea, so no log POW could be calculated.
The log POW of the third peak could be calculated but retention time of the third peak lay below the reference substance with the lowest log Pow, 2-Butanone (log POW = 0.3) and thus lies outside the calibration range. Therefore, the log POW can only be extrapolated. The log Pow of the fourth peak could also be calculated and gave a log POW of 1.3.
No observations were made which might cause doubts concerning the validity of the study outcome.
Reference
Peak | Measurement No. | k | logk | log Pow |
1 | 1 | -0.2343 | n.c. | n.c. |
2 | -0.2400 | n.c. | n.c. | |
3 | -0.2457 | n.c. | n.c. | |
Mean | n.c. | |||
Standard deviation | n.c. | |||
2 | 1 | -0.0457 | n.c. | n.c. |
2 | -0.0457 | n.c. | n.c. | |
3 | -0.0457 | n.c. | n.c. | |
Mean | n.c. | |||
Standard deviation | n.c. | |||
3 | 1 | 0.1771 | -0.7517 | 0.169 |
2 | 0.1771 | -0.7517 | 0.169 | |
3 | 0.1771 | -0.7517 | 0.169 | |
Mean | 0.169 | |||
Standard deviation | 0.000 | |||
4 | 1 | 0.4286 | -0.3680 | 1.333 |
2 | 0.4286 | -0.3680 | 1.333 | |
3 | 0.4286 | -0.3680 | 1.333 | |
Mean | 1.333 | |||
Standard deviation | 0.000 |
log POW was calculated from the capacity factor as follows:
log POW = (log k + 0.8075) / 0.3297
Description of key information
The partition coefficient was determined in the range of <0.3 -1.3 at 25°C (OECD 107)
Key value for chemical safety assessment
Additional information
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.