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EC number: 452-330-3 | 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
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 10 December 2003 to 17 December 2003
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- gas saturation method
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Conclusions:
- Under the conditions of the test, the vapour pressure of the test material was determined to be 1.3 x 10^-7 at 20 °C and 3.3 x 10^-7 at 25 °C with a heat of sublimation of 132.1 kJ/mole. The study is considered to be reliable, relevant and adequate for risk assessment purposes.
- Executive summary:
The vapour pressure of the test material was determined in accordance with the standardised guidelines OECD 104, EU Method A.4 and EPA OPPTS 830.7950 using the gas saturation method. The suitability of the test system was checked against the literature values provided by the OECD guideline for hexachlorobenzene, which were found to be in agreement with experimentally obtained values. Under the conditions of the test, the vapour pressure of the test material was determined to be 1.3 x 10-7 at 20 °C and 3.3 x 10-7 at 25 °C with a heat of sublimation of 132.1 kJ/mole.
Reference
Table 1: Results for the test material (experiments in the solid phase)
Temperature (ºC) |
Saturation Gas Flow Rate (N2) (ln/h) |
Volume (ln) |
Duration of experiment (h) |
Amount of transported substance (µg) |
Vapour pressure (Pa) |
50.34 |
12.00 |
1433.295 |
119.45 |
3.4 |
2.17 x 10-5 |
79.90 |
12.09 |
261.663 |
21.65 |
37.5 |
1.31 x 10-3 |
100.58 |
3.06 |
46.209 |
15.11 |
76.9 |
1.52 x 10-2 |
100.57 |
6.01 |
35.313 |
5.88 |
62.5 |
1.62 x 10-2 |
100.55 |
11.97 |
40.684 |
3.40 |
72.9 |
1.64 x 10-2 |
26.86 |
12.08 |
2697.570 |
223.30 |
<1 |
<3.39 x 10-8 |
Equation for the calculation of the vapour pressure of the test material at a given temperature:
P = (G*R*273.15)/(Mg*Vo*1000)
where:
P = Pressure in Pascal
G = amount of transported substance in µg
R = gas constant = 8.31451 J/mole*K
Mg = Molecular weight = 248.3
Vo = Gas volume in ln, litre normal (0 °C, 1 bar)
Remarks:
- The volume of nitrogen is given in litres at normal conditions (0 ºC and 1 atmosphere).
- In all experiments the condensation temperature was at least 30 ºC lower as the oven temperature .
- The gas flow rate was ranged from 3 L/h until 12 L/h. A saturation control was performed at 100.6 °C. The scattering of the vapour pressure measured at 100.6 °C for 3.1 L/h, 6.0 L/h and 12.0 L/h was in the normal error limit for the gas saturation method. The measured values were 1.52 x 10-2 Pa, 1.62 x 10-2 Pa and 1.6 x 10 -2 Pa.
The measurements in the solid state were fitted with a linear regression. For the measurement at 26.9 °C only a lower limit for the collected amount of substance was determined, this was omitted from the fit. Examination of the coefficients determined that the measurement at 26.9 °C was in accordance with the correct vapour pressure determined with the other points in the fit.
The coefficients of the equation:
Ln P = -A/T + B
where:
A = 15885.2062
B = 38.364589
Correlation with the regression line = 0.999 with P in Pascal and T in Kelvin
Heat of sublimation = 132.1 kJ/mole
Melting point (DSC) : 195.1 °C
Heat of fusion (DSC) : 29.2 kJ/mol
Vapour pressure at 20 °C: 1.3 x 10-7 Pa
Vapour pressure at 25 °C: 3.3 x 10-7 Pa
Heat of vaporisation = heat of sublimation - heat of fusion = 102.9 kJ/mol
The equation of the extrapolated curve to the liquid state:
Ln P = -A/T + B
where:
A = 12373.2735
B = 30.864486
Heat of evaporation: 102.9 kJ/mol.
The system was checked for suitability using hexachlorobenzene. The experimental data obtained were in good agreement with the reference values provided in the guideline.
Description of key information
1.3 x 10^-7 Pa at 20 °C
3.3 x 10^-7Pa at 25 °C
Heat of sublimation of 132.1 kJ/mole, OECD TG 104, Geoffroy 2003
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 20 °C
Additional information
The vapour pressure of the test material was determined in accordance with the standardised guidelines OECD 104, EU Method A.4 and EPA OPPTS 830.7950 using the gas saturation method. The suitability of the test system was checked against the literature values provided by the OECD guideline for hexachlorobenzene, which were found to be in agreement with experimentally obtained values. Under the conditions of the test, the vapour pressure of the test material was determined to be 1.3 x 10-7 Pa at 20 °C and 3.3 x 10-7 Pa at 25 °C with a heat of sublimation of 132.1 kJ/mole. The study was performed in line with GLP and accepted standardised guidelines with a high standard of reporting. The study was assigned a reliability score of Klimisch 1 and considered suitable for assessment as an accurate reflection of the test substance.
The available data are considered to be complete and the result determined, 1.3 x 10-7 Pa at 20 °C, was taken forward for risk assessment.
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