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EC number: 204-017-6 | CAS number: 112-92-5
- 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:
- other: Data obtained from a collection of reliable data
- Adequacy of study:
- supporting study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Principles of method if other than guideline:
- Method: other (measured)
- Partition coefficient type:
- octanol-water
- Type:
- log Pow
- Partition coefficient:
- 7.19
- Conclusions:
- A log Kow value of 7.19 was reported for the substance in a collection of reliable data.
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2010-10-09
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods with acceptable restrictions
- Remarks:
- Test procedure in accordance with national standard methods (ASTM) without GLP.
- Qualifier:
- according to guideline
- Guideline:
- other: ASTM E 1147
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- HPLC method
- Partition coefficient type:
- octanol-water
- Analytical method:
- high-performance liquid chromatography
- Type:
- log Pow
- Partition coefficient:
- 7.4
- Remarks on result:
- other: The temperature of the measurement is not reported.
- Conclusions:
- A log Kow value of 7.4 was determined for the substance using a relevant test method. The result is considered to be reliable.
- Executive summary:
Octadecan-1-ol was determined according ASTM E 1147 . The partition coefficient was determined to be logPow 7.4.
- Endpoint:
- partition coefficient
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Study period:
- 2009-04-30
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods with acceptable restrictions
- Remarks:
- Test procedure in accordance with national standard methods (OECD) without GLP.
- 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
- Specific details on test material used for the study:
- The study was conducted on a mixture of Alcohols, C16 and C18 using chromatography method. The result is for C18 alcohol.
- Analytical method:
- high-performance liquid chromatography
- Type:
- log Pow
- Partition coefficient:
- 8.2
- Temp.:
- 23 °C
- pH:
- 7.1
- Conclusions:
- A log Kow value of 8.2 at 23°C and a pH of 7.1 was determined for the substance using a relevant test method. The result is considered to be reliable.
- Executive summary:
Octadecan-1-ol was determined according OECD Guideline 117. The partition coefficient was determined to be 8.2 at 23 °C and a pH of 7.1.
Referenceopen allclose all
Measurement
Log Kow: 7.4
Calibration
For calibration 20 -30 mg of the reference samples and of thio urea (dead time determination) are weighed into a 100 ml volumetric flask and filled up to 100 ml of a methanol-water mixture (80:20). This calibration mixture (L090443) is then analysed by the reported chromatographic conditions.
substances | log Pow | retention time (min.) | capacity factor k | log k |
phenylbenzoate | 3.6 | 2.13 | 0.593 | -0.23 |
diphenyl ether | 4.2 | 2.63 | 0.964 | -0.02 |
dibenzyl | 4.8 | 3.90 | 1.913 | 0.28 |
flouranthene | 5.1 | 4.86 | 2.633 | 0.42 |
triphenylamine | 5.7 | 6.07 | 3.538 | 0.55 |
correlation log k and Pow
slope:2.52
axis intercept:4.17
correlation coefficient:0.991
Measurement
200 -300 mg of the test sample are weighed into a 100 ml volumetric flask and filled up to 100 ml with methanol.
retention time (minutes) for C16:25.36
peak area for C16:73668
capacity factor for C16:17.95
log k for C16:1.25
log POW for C16:7.3
retention time (minutes) for C18:56.55
peak area for C18:192267
capacity factor k for C18:41.26
log k for C18:1.62
log POW for C18:8.2
Description of key information
The octanol-water partition coefficient of octadecan-1-ol is 7.4 (by HPLC method) for a commercial sample. A value of 7.19 is available determined by HPLC for a pure sample and reported in reliable published literature source (HPLC).
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 7.4
Additional information
A log n-octanol/water partition coefficient of 7.4 was determined for octadecan-1-ol in accordance with ASTM E 1147. The result is considered to be reliable.
It is supported by a value of 7.19 determined by HPLC for a pure sample and reported in published literature, and a value of 8.2 determined for C18 from a study of a multi-constituent commercial substance by HPLC.
The value taken from literature for pure alcohol (7.19) is used in exposure modelling.
Discussion of trends in the Category of C6-24 linear and essentially-linear aliphatic alcohols:
As chain length increases, the free energy required for a molecule to dissolve becomes less favourable for larger molecules. The octanol-water partition coefficient increases with molecular weight because each additional -CH2- group makes the octanol phase more preferred over water in terms of relative solvation energy.
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