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EC number: 271-663-3 | CAS number: 68603-55-4
- 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
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 107 (Partition Coefficient (n-octanol / water), Shake Flask Method)
- Deviations:
- not specified
- GLP compliance:
- yes
- Type of method:
- flask method
- Partition coefficient type:
- octanol-water
- Analytical method:
- other: LC-MS
- Key result
- Type:
- log Pow
- Partition coefficient:
- > 2.47
- Temp.:
- 22 °C
- pH:
- ca. 4
- Remarks on result:
- other: UVCB
- Remarks:
- As shown above one component is hydrophilic having a log Kow value of 0.58, whereas the remaining constituents da show higher log Kow values; given the difficulties of determining accurate water solubility values of individual components of this UVCB substance due to sensitivity limitations, the accuracy of log Kow values as reported above is limited.
- Details on results:
- LC-MS area% assessment indicated three components >10% in the test substance Deophos 228, lntertek Reference 10568367, plus dodecylamine which could not be included in area% valuation due to different ionisation properties.
- Conclusions:
- As shown above one component is hydrophilic having a log Kow value of 0.58, whereas the
remaining constituents da show higher log Kow values; given the difficulties of determining accurate
water solubility values of individual components of this UVCB substance due to sensitivity
limitations, the accuracy of log Kow values as reported above is limited. - Executive summary:
Analyte Log Kow Value
dodecylamine >2.36
bis(2-ethylhexyl) phosphate >2.47
2-ethylhexyl phosphate 0.58
2-ethylhexyl hexyl phosphate >1 .78
As shown above one component is hydrophilic having a log Kow value of 0.58, whereas the
remaining constituents da show higher log Kow values; given the difficulties of determining accurate
water solubility values of individual components of this UVCB substance due to sensitivity
limitations, the accuracy of log Kow values as reported above is limited.
Reference
Conclusion - Dodecvlamine
A Log P value of >2.36 was obtained, the ">" value was used because the water layers
were reported as <2 mg/L. The actual value, which may be significantly lower, could not be
determined as the values in the water solutions were similar or lower than the value in the
water blank.
The recoveries for dodecylamine test solution vary between 58% and 104%. This suggests
due to the Iew recovery in water, that there may be Iosses in the octanollayer. But it should
be noted that the recovery value is dependent on an accurate area% value, and variations
will be inherent in this value as a nominal value from a similar batch has been used.
The stock solution recovery values are similar to those obtained for the test solutions,
indicating no significant evidence of degradation during testing.
Reporting of the Log P value as a ">" value does cover a possible increase in the Log P
value due to Iosses from octanol but considerations should also be given to the impact of
variation in the dodecylamine content used which was not specific to the test substance.
Both factors will impact the accuracy of the Log P value reported although the individual
values obtained are within the ±0.3 Log units considered appropriate for this test.
Conclusion - Bis(2-ethylhexyl) Phosphate
A Log P value of >2.47 was obtained, the ">" value was used beGause the water layers
were reported as <1 mg/L. The aGtual value, whiGh may be signifiGantly lower, could not be
determined as the values in the water solutions were similar or lower than the value in the
water blank.
The recoveries for bis(2-ethylhexyl) phosphate test solutions vary between 36% and 42%,
suggesting Iosses in the octanol layer. But it should be noted that the recovery value is
dependent on an accurate area% value, and variation may be inherent in the values due to
the differences in ionisation for each component and that not all components may be
observed by LC-MS.
The stock solution recovery values for bis(2-ethylhexyl) phosphate are similar to those
obtained for the test solutions, indicating no significant evidence of degradation du ring
testing.
Reporting of the Log P value as a ">" value does cover a possible increase in the Log P
value due to Iosses from octanol but considerations should also be given to the impact of
variation in the bis(2-ethylhexyl) phosphate content used which was not specific to the test
substance. 8oth factors will impact the accuracy of the Log P value reported. The individual
values obtained are slightly outside the ±0.3 Log units considered appropriate for this test
(maximum difference is 0.35) but this is impacted by the use of "<" values and is not
considered significant.
Conclusion - 2-Ethylhexyl Phosphate
A Log P value of 0.58 was obtained.
The recoveries for 2-ethylhexyl phosphate test solutions varied between 144% and 322%.
This varies from the other related components in that no Iosses are evident, but overestimation
does appear to occur. Again it is noted that recovery is dependent on an
accurate area% value as discussed previously.
The stock solution recoveries for 2-ethylhexyl phosphate are similar to those obtained for
the test solutions, i.e. they are higher than expected, although the magnitude is not as great.
Given the variation obtained during the analysis, this is regarded as an indication of no
significant evident of degradation during testing.
The individual values obtained are within the ±0.3 Log units considered to be appropriate for
this test.
Conclusion - 2-Ethylhexyl Hexyl Phosphate
A Log P value of > 1. 78 was obtained, the ">" value was used because the water layers
were reported as <1 mg/L. The actual value, which may be significantly lower, could not be
determined as the values in the water solutions were similar or lower than the value in the
water blank.
The recoveries for 2-ethylhexyl hexyl phosphate test solutions vary between 40% and 50%,
suggesting Iosses in the octanol layer. But it should be noted that the recovery value is
dependent on an accurate area% value, and variation may be inherent in the values due to
the differences in ionisation for each component and that not all components may be
observed by LC-MS.
The stock solution recovery values for 2-ethylhexyl hexyl phosphate are similar to those
obtained for the test solutions, indicating no significant evidence of degradation during
testing.
Reporting of the Log P value as a ">" value does cover a possible increase in the Log P
value due to Iosses from octanol but considerations should also be given to the impact of
variation in the 2-ethylhexyl hexyl phosphate content used which was not specific to the test
substance. 8oth factors will impact the accuracy of the Log P value reported. The individual
values obtained are slightly outside the ±0.3 Log units considered appropriate for this test
(maximum difference is 0.42) but this is impacted by the use of "<" values and is not
considered significant.
Description of key information
The partition coefficient was determined according to OECD Guideline 107.
Key value for chemical safety assessment
- Log Kow (Log Pow):
- 2.47
- at the temperature of:
- 22 °C
Additional information
The log Kow values of individual constituents are reported as: >2.36 (dodecylamine), >2.47 bis-(2 -ethylhexyl) phosphate, 0.58 () and >1.78 (2 -ethylhexyl hexyl phosphate). However for the prupose of CSA, the highest value is taken forward. Due to the difficulties of determining accurate water solubility values of individual components of this UVCB substance due to sensitivity limitations, the accuracy of log Kow values is limited.
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