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Diss Factsheets
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EC number: 203-497-4 | CAS number: 107-51-7
- 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
Henry's Law constant
Administrative data
Link to relevant study record(s)
- Endpoint:
- Henry's law constant
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Remarks:
- The study was conducted according to an appropriate test method, but not in compliance with GLP.
- Principles of method if other than guideline:
- The Kaw, Kow and Koa of 14C-labelled L3 were simultaneously determined at room temperature. A custom-made glass apparatus was used for the test, which allowed for the establishment of octanol/air/water three-phase equilibrium. The concentrations of the test substance in the three phases were analysed by LSC and HPLC/RAM.
- GLP compliance:
- no
- H:
- 1 620 000 Pa m³/mol
- Temp.:
- 12 °C
- H:
- 2 680 000 Pa m³/mol
- Temp.:
- 20.8 °C
- Conclusions:
- An air-water partition coefficient (log Kaw) value of 3.04 at 20.8°C was determined in a reliable study conducted according to an appropriate test protocol. This is equivalent to a Henry's Law Constant of 2.68E+06 Pa m3 mol-1 at 20.8°C; 1.62E+06 Pa m3 mol at 12°C.
Reference
Equilibrium concentrations of the test substance in the test vessels were achieved after 20 hours. At 20.8 ± 0.4°C, partitioning coefficients were determined in a range of L3 concentrations in water (2.7 to 6.3 µg L-1) much lower than its solubility limit (34 µg L-1at 25°C). The measured values of log Kow the substance was 6.87 ± 0.24 (average ± standard deviation). The measured partitioning coefficients at three other temperatures (4.5 ± 0.2, 12.1± 0.0, and 35 ± 0.3°C) can be well described by the following equation: log Kow= 6.97 - 54.3/T r2= 0.02 (n = 4) The r2 was very small because the measured log Kow values were almost constant in the entire temperature range. This implies that the log Kow of L3 is not temperature dependent at the temperature range tested. The internal energy change for phase transfer in partition equilibria (delta U) for L3 (defined as 2.303 × Ideal gas constant × slope) was -1.0 KJ mol-1 for octanol/water partitioning.
Type |
Partition coefficient |
Temp. |
pH |
Remarks |
log Pow |
6.87 |
20.8 °C |
|
log Kow = ± 0.24, Temp. = ± 0.4°C |
|
|
20.8 °C |
|
log Koa = 3.79± 0.01, Temp. = ± 0.4°C |
|
|
20.8 °C |
|
log Kaw = 3.04± 0.20, Temp. = ± 0.4°C |
Description of key information
Log Kaw: 3.04 ± 0.20 at 20.8 ± 0.4°C
Henry's Law Constant: Calculated HLC for L3 at environmental temperature (12°C): 1.62 E+06 Pa m3mol-1
Key value for chemical safety assessment
- Henry's law constant (H) (in Pa m³/mol):
- 1 620 000
- at the temperature of:
- 12 °C
Additional information
The transfer of a substance from the water phase to the gas phase can be estimated by means of the Henry’s Law Constant (HLC).
A log Kaw of 3.04 (Kaw = 1096) at 20.8°C was determined in a reliable study conducted according to generally accepted scientific principles.
This is equivalent to Henry's Law Constant (HLC) of 2680000 Pa m3 mol-1 at 20.8°C, 1620000 Pa m3 mol-1 at 12°C.
(HLC = Kaw x RT)
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