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EC number: 936-120-3 | 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:
- 11.-12.10.2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- GLP compliance:
- no
- Type of method:
- effusion method: vapour pressure balance
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Key result
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Test no.:
- #3
- Temp.:
- 50 °C
- Vapour pressure:
- 0.001 Pa
- Conclusions:
- The vapour pressure of the test item was determined to be 1.3E-5 Pa (20 °C), 3.1E-5 Pa (25 °C) and 1.4E-3 Pa (50 °C).
- Executive summary:
A study was performed according to OECD TG 104 and Commission Regulation (EC) No. 440/2008, method A.4 in order to determine the vapour pressure of the test item by using the effusion method. The vapour pressure was measured by determining the boiling point of the test item at various temperatures between about 70 - 110 °C. The vapour pressures of the test item at 20, 25 and 50 °C were extrapolated by using the Antoine constants with following results: 1.3E-5 Pa (20 °C), 3.1E-5 Pa (25 °C) and 1.4E-3 Pa (50 °C).
Reference
The vapour pressure was measured in the temperature range of 70 °C to 110 °C. The measured vapour pressures at the corresponding temperatures are listed in Table 1. After the measurement a mass loss of approx. 9 % (w/w) was determined.
Table 1: Measured vapour pressures and corresponding temperatures
Temperature /°C |
Vapour pressure / hPa |
70 |
1.7E-4 |
80 |
7.8E-4 |
90 |
2.4E-3 |
100 |
6.4E-3 |
110 |
1.5E-2 |
The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C as shown in Table 2.
Table 2: Antoine parameters
A |
14.90619 |
B |
-6385.51 |
C |
273.15 |
Table3 : Final vapour pressures
T/°C |
p/hPa |
p/Pa |
20 |
1.3E-7 |
1.3E-5 |
25 |
3.1E-7 |
3.1E-5 |
50 |
1.4E-5 |
1.4E-3 |
Description of key information
A study was performed according to OECD TG 104 and Commission Regulation (EC) No. 440/2008, method A.4 in order to determine the vapour pressure of the test item by using the effusion method. The vapour pressure was measured by determining the boiling point of the test item at various temperatures between about 70 - 110 °C. The vapour pressures of the test item at 20, 25 and 50 °C were extrapolated by using the Antoine constants with following results: 1.3E-5 Pa (20 °C), 3.1E-5 Pa (25 °C) and 1.4E-3 Pa (50 °C).
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
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