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EC number: 807-349-5 | CAS number: 1198395-24-2
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:
- 11.07. - 11.09.14
- 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: vapour pressure balance
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 0 hPa
- Key result
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 0 hPa
- Test no.:
- #3
- Temp.:
- 50 °C
- Vapour pressure:
- 0 hPa
- Conclusions:
- The vapour pressure of the test item at 25 °C was determined to be 5.1x10E-7 Pa.
- Executive summary:
A study was conducted according to OECD TG 104, Regulation (EC) No 440/2008 method A.4 to determine the vapour pressure of the test item. The vapour pressure of the test item was determined in the temperature range 50-115 °C. The measured vapour pressures values at 50 °C and 60 °C were most likely caused by volatile impurities. The measurement at 70 °C showed an ambiguous behaviour and the resulting vapour pressure value was in the range of the lower detection limit of 10~5 hPa. Therefore the measured vapour pressure values between 50 °C and 70 °C were not taken into account for the evaluation of the vapour pressure. The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C. The vapour pressure was calculated to be 5.1 x 10E-7 Pa at 20 °C and 1.1 x 10E-6 Pa at 25 °C and 2.9 x 10E-5 Pa at 50 °C, respectively.
Reference
The vapour pressure was measured in the temperature range of 50 °C to 115 °C. The measured vapour pressures at the corresponding temperatures are listed below:
Measured vapour pressures and corresponding temperatures
Temperature / °C |
Vapour pressure / hPa |
50 |
2.0 x 10E-5 |
60 |
1.6 x 10E-5 |
70 |
1.1 x 10E-5 |
80 |
1.1 x 10E-5 |
90 |
1.8 x 10E-5 |
100 |
3.6 x 10E-5 |
105 |
9.0 x 10E-5 |
110 |
1.6 x 10E-4 |
115 |
2.6 x 10E-4 |
The measured vapour pressures values at 50 °C and 60 °C were most likely caused by volatile impurities. The measurement at 70 °C showed an ambiguous behaviour and the resulting vapour pressure value was in the range of the lower detection limit of 10~5 hPa. Therefore the measured vapour pressure values between 50 °C and 70 °C were not taken into account for the evaluation of the vapour pressure. Only for better readability the temperature is also reported in a centigrade scale. The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C. The following vapour pressure values for the test item were extrapolated from the experimental data:
20 °C: 5.1 x 10E-7Pa
25 °C: 1.1 x 10E-6Pa
50 °C: 2.9 x 10E-5Pa
Description of key information
The vapour pressure of the test item at 25 °C was determined to be 5.1x10E-7 Pa (reference 4.6 -1).
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, Regulation (EC) No 440/2008 method A.4 to determine the vapour pressure of the test item (reference 4.6 -1). The vapour pressure of the test item was determined in the temperature range 50-115 °C. The measured vapour pressures values at 50 °C and 60 °C were most likely caused by volatile impurities. The measurement at 70 °C showed an ambiguous behaviour and the resulting vapour pressure value was in the range of the lower detection limit of 10~5 hPa. Therefore the measured vapour pressure values between 50 °C and 70 °C were not taken into account for the evaluation of the vapour pressure. The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C. The vapour pressure was calculated to be 5.1 x 10E-7 Pa at 20 °C and 1.1 x 10E-6 Pa at 25 °C and 2.9 x 10E-5 Pa at 50 °C, respectively.
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