Registration Dossier
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EC number: 617-606-1 | CAS number: 84656-75-7
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:
- 12.03.-09.04.2014
- 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)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- effusion method: vapour pressure balance
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0.001 Pa
- Temp.:
- 50 °C
- Vapour pressure:
- 0.003 Pa
- Conclusions:
- The vapour pressure of the test item was calculated to be 4.6E-5 Pa at 20 °C, 9.7E-5 Pa at 25 °C and 3.0E-5 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 (vapo ur pressure balance). The vapour pressure was measured in the temperature range of 40 °C to 105 °C. After the measurement the measuring cell was empty. The last measurement temperature of 105 °C could not be evaluated as is assumed that the measuring cell was empty after the measurement of 100 °C. The vapour pressure of the test item was calculated to be 4.6E-5 Pa at 20 °C, 9.7E-5 Pa at 25 °C and 3.0E-5 Pa at 50 °C, respectively.
Reference
The vapour pressure was measured in the temperature range of 40 °C to 105 °C. After the measurement the measuring cell was empty. The last measurement temperature of 105 °C could not be evaluated as is assumed that the measuring cell was empty after the measurement of 100 °C. The measured vapour pressures at the corresponding temperatures of 40 °C to 100 °C are listed in Table 1.
Table 1: Measured vapour pressures and corresponding temperatures
Temperature/ °C |
Vapour pressure/ hPa |
40 |
1.9E-5 |
50 |
3.1E-5 |
60 |
9.4E-5 |
70 |
3.3E-4 |
75 |
6.1E-4 |
80 |
1.1E-3 |
85 |
1.6E-3 |
90 |
2.7E-3 |
95 |
3.8E-3 |
100 |
8.0E-3 |
The measured vapour pressure at 40 °C was most likely caused by volatile impurities and was therefore not taken into account for the evaluation of the vapour pressure. The values for 20, 25 and 50 °C are calculated, using the Antoine equation.
T/ °C |
p/ hPa |
p/ Pa |
20 |
4.6E-7 |
4.6E-5 |
25 |
9.7E-7 |
9.7E-5 |
50 |
3.0E-5 |
3.0E-3 |
Description of key information
The vapour pressure of the test item was calculated to be 4.6E-5 Pa at 20 °C, 9.7E-5 Pa at 25 °C and 3.0E-5 Pa at 50 °C, respectively.
Key value for chemical safety assessment
- Vapour pressure:
- 0 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 (vapour pressure balance). The vapour pressure was measured in the temperature range of 40 °C to 105 °C.After the measurement the measuring cell was empty. The last measurement temperature of 105 °C could not be evaluated as is assumed that the measuring cell was empty after the measurement of 100 °C.The vapour pressure of the test item was calculated to be 4.6E-5 Pa at 20 °C, 9.7E-5 Pa at 25 °C and 3.0E-5 Pa at 50 °C, respectively.
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