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EC number: 255-037-7 | CAS number: 40690-89-9
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:
- November 01, 2016 - November 03, 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)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- effusion method: Knudsen cell
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Executive summary:
The following vapour pressure values for the test item were extrapolated from the experimental data:
T / °C
p / hPa
p / Pa
20
1.6×10-6
1.6×10-4
25
2.1×10-6
2.1×10-4
50
8.1×10-6
8.1×10-4
Reference
Vapour pressure balance
The vapour pressure was measured in the temperature range of 40 °C to 120 °C. The derived vapour pressures at the corresponding temperatures are listed in Table 1.
Table1: Measured vapour pressures and corresponding temperatures
Temperature / °C |
Vapour pressure / hPa |
40 |
3.3 × 10-6 |
50 |
8.3 × 10-6 |
60 |
1.5 × 10-5 |
70 |
2.6 × 10-5 |
80 |
4.2 × 10-5 |
90 |
5.5 × 10-5 |
100 |
6.2 × 10-5 |
110 |
9.3 × 10-5 |
120 |
1.2 × 10-4 |
The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C as shown inTable 2.
Table2: Antoine parameters and extrapolated vapour pressures
T / °C |
p / hPa |
log (p/hPa) = A + B/(C+T[°C]) |
|
20 |
1.6×10-6 |
A = |
1.9216 |
25 |
2.1×10-6 |
B = |
-2266 |
50 |
8.1×10-6 |
C = |
273.15 |
Description of key information
The following vapour pressure values for the test item were extrapolated from the experimental data:
T / °C |
p / hPa |
p / Pa |
20 |
1.6×10-6 |
1.6×10-4 |
25 |
2.1×10-6 |
2.1×10-4 |
50 |
8.1×10-6 |
8.1×10-4 |
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
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