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EC number: 940-307-5 | 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
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- Nanomaterial crystalline phase
- Nanomaterial crystallite and grain size
- Nanomaterial aspect ratio / shape
- Nanomaterial specific surface area
- Nanomaterial Zeta potential
- Nanomaterial surface chemistry
- Nanomaterial dustiness
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- Nanomaterial pour density
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- Nanomaterial radical formation potential
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- Endpoint summary
- Stability
- Biodegradation
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- Transport and distribution
- Environmental data
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- Ecotoxicological Summary
- Aquatic toxicity
- Endpoint summary
- Short-term toxicity to fish
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- 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:
- from 2018-11-02 to 2019-01-28
- 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
- GLP compliance:
- no
- Type of method:
- effusion method: Knudsen cell
- Temp.:
- 20 °C
- Vapour pressure:
- 0.001 Pa
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0.001 Pa
- Temp.:
- 50 °C
- Vapour pressure:
- 0.034 Pa
- Conclusions:
- The vapour pressure of the test item was determined to be 6.9E-4 Pa at 20 °C, 1.4E-3 Pa at 25 °C and 3.4E-2 Pa at 50 °C, respectively.
- Executive summary:
A study was conducted according to OECD TG 104 and Regulation (EC) No 440/2008 method A.4 to determine the vapour pressure of the test item using the effusion method: Knudsen cell. The vapour pressure of the test item was determined at temperatures between 15 and 120 °C. After the measurement a mass loss of 100 % (w/w) was determined. At 100 °C the test cell was already empty. Therefore, only measurements below 100 °C were used for further evaluation. Using the Antoine equation, the constants A and B were determined and the vapour pressure of the test item at 20, 25 and 50 °C was extrapolated from the experimental vapour pressure. The vapour pressure was calculated to be 6.9E-4 Pa at 20 °C, 1.4E-3 Pa at 25 °C and 3.4E-2 Pa at 50 °C, respectively.
Reference
The vapour pressure was measured in the temperature range of 15 °C to 120 °C. After the measurement a mass loss of 100 % (w/w) was determined. At 100 °C the test cell was already empty. Therefore, only measurements below 100 °C were used for further evaluation.
Table 1: Measured vapour pressures and corresponding temperatures
Temperature / °C |
Vapour pressure / hPa |
15 |
n.e. |
20 |
n.e. |
25 |
1.4E-5 |
30 |
3.4E-5 |
40 |
9.6E-5 |
50 |
3.0E-4 |
60 |
1.1E-3 |
70 |
3.3E-3 |
80 |
8.9E-3 |
90 |
2.3E-2 |
n.e.: not evaluable
The values for 20, 25 and 50 °C were calculated, using the Antoine constants A, B and C.
Table 2: Antoine parameters and extrapolated vapour pressures
T / °C |
Log (p/hPa) = A + B / (C + T [°C]) |
p / hPa |
p / Pa |
20 |
A = 13.00439 |
6.9E-6 |
6.9E-4 |
25 |
B = -5324.83 |
1.4E-5 |
1.4E-3 |
50 |
C = 273.15 |
3.4E-4 |
3.4E-2 |
Description of key information
The vapour pressure of the test item was determined to be 6.9E-4 Pa at 20 °C, 1.4E-3 Pa at 25 °C and 3.4E-2 Pa at 50 °C, respectively.
Key value for chemical safety assessment
- Vapour pressure:
- 0.001 Pa
- at the temperature of:
- 25 °C
Additional information
A study was conducted according to OECD TG 104 and Regulation (EC) No 440/2008 method A.4 to determine the vapour pressure of the test item using the effusion method: Knudsen cell (reference 4.6-1). The vapour pressure of the test item was determined at temperatures between 15 and 120 °C. After the measurement a mass loss of 100 % (w/w) was determined. At 100 °C the test cell was already empty. Therefore, only measurements below 100 °C were used for further evaluation. Using the Antoine equation, the constants A and B were determined and the vapour pressure of the test item at 20, 25 and 50 °C was extrapolated from the experimental vapour pressure. The vapour pressure was calculated to be 6.9E-4 Pa at 20 °C, 1.4E-3 Pa at 25 °C and 3.4E-2 Pa at 50 °C, respectively.
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