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EC number: 242-440-8 | CAS number: 18599-22-9
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:
- March 10, 2020
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2006
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- dynamic method
- Key result
- Test no.:
- #3
- Temp.:
- 50 °C
- Vapour pressure:
- 667 hPa
- Key result
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 204 hPa
- Key result
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 253 hPa
- Key result
- Vapour pressure:
- 667 hPa
- Executive summary:
The following vapour pressure values for the test item were extrapolated from the experimental data (vapour pressure: dynamic method):
T / °C
p / hPa
p / Pa
20
203.90
20390
25
252.58
25258
50
666.92
66692
Reference
Individual results
The vapour pressure was measured with the dynamic method in the temperature range of 13 °C to 59 °C. The measured vapour pressures at the corresponding temperatures are listed in Table 1.
Table 1: Measured vapour pressures and corresponding temperatures
Temperature / °C |
Vapour pressure / hPa |
13.3 |
150 |
19.5 |
200 |
24.8 |
250 |
29.1 |
300 |
32.9 |
350 |
36.3 |
400 |
42.1 |
500 |
47.0 |
600 |
51.4 |
700 |
58.8 |
900 |
39.4 |
450 |
From the measured data the parameters A, B and C of the Antoine equation can be derived by regression.
The evaluated Antoine parameters are listed in Table 2.
Table 2: Antoine parameters
A |
7.853 |
B |
-1625 |
C |
273.15 |
The vapour pressure values for 20, 25 and 50 °C (see Table 3) were interpolated (values at 20 °C, 25 °C and 50 °C), using these Antoine constants A, B and C.
Table 3: Vapour pressures
T / °C |
p / hPa |
p / Pa |
20 |
203.90 |
20390 |
25 |
252.58 |
25258 |
50 |
666.92 |
66692 |
Description of key information
The following vapour pressure values for the test item were extrapolated from the experimental data (vapour pressure: dynamic method):
T / °C | p / hPa | p / Pa |
20 | 203.90 | 20390 |
25 | 252.58 | 25258 |
50 | 666.92 | 66692 |
Key value for chemical safety assessment
- Vapour pressure:
- 204 hPa
- at the temperature of:
- 20 °C
Additional information
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