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EC number: 943-893-0 | CAS number: -
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:
- 21 Sep - 22 Sep 2016
- 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)
- Version / remarks:
- 2009
- GLP compliance:
- no
- Type of method:
- effusion method: Knudsen cell
- Specific details on test material used for the study:
- Storage conditions: ambient temperature (10 to 30 °C), dry
- Temp.:
- 20 °C
- Vapour pressure:
- 0 hPa
- Remarks on result:
- other: extrapolated from experimental data
- Temp.:
- 25 °C
- Vapour pressure:
- 0 hPa
- Remarks on result:
- other: extrapolated from experimental data
- Temp.:
- 50 °C
- Vapour pressure:
- 0 hPa
- Remarks on result:
- other: extrapolated from experimental data
Reference
Results
Vapour pressure balance
Vapour pressure was measured in the temperature range of 70 to 120 °C
(Table 1).
Table 1 – Measured vapour pressures and corresponding temperatures
Temperature [°C] |
Vapour pressure [hPa] |
70 |
2.6E-06 |
80 |
8.1E-06 |
90 |
1.3E-05 |
100 |
2.5E-05 |
110 |
6.7E-05 |
120 |
1.9E-04 |
Data points at 70 and 80 °C were excluded from the linear regression as they were below the detection limit. The values for 20, 25 and 50 °C were calculated using the Antoine constants A, B and C as shown in Table 2.
Table 2 – Antoine parameters and extrapolated vapour pressures
T [°C] |
p [hPa] |
log p = A + B/ (C+T) |
20 |
2.4E-09 |
A = 10.44737 |
25 |
5.0E-09 |
B = -5591.23 |
50 |
1.4E-07 |
C = 273.15 |
Description of key information
2.4E-09 hPa at 20 °C
5.0E-09 hPa at 25 °C
1.4E-07 hPa at 50 °C
(OECD 104, extrapolated from experimental data)
Key value for chemical safety assessment
- Vapour pressure:
- 0 hPa
- at the temperature of:
- 20 °C
Additional information
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