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EC number: 947-964-7 | 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:
- from 2018-08-15 to 2018-09-05
- 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
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: Knudsen cell
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 214.2 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- 380 Pa
- Temp.:
- 50 °C
- Vapour pressure:
- 5 115 Pa
- Conclusions:
- The vapour pressure of the test item was determined at 20, 25 and 50 °C to be 214.2 Pa, 380 Pa and 5115 Pa, respectively.
- Executive summary:
A study was conducted according to OECD TG 104, Regulation (EC) No 440/2008 method A.4 and OPPTS 830.7950 to determine the vapour pressure of the test item. The vapour pressure of the test item was determined at temperatures between 27 and 42 °C using the effusion method (Knudsen cell). For the evaluation the vapour pressure values in the range of 27 to 42 °C were used. The vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C. The vapour pressure was calculated to be 214.1 Pa at 20 °C, 380 Pa at 25 °C and 5115 Pa at 50 °C, respectively.
Reference
The vapour pressure was measured in the temperature range of 27 to 42 °C. For the evaluation the vapour pressure values in the range of 27 to 42 °C were used.
Table 1. Results of the Effusion method
Stage No. |
Temperature, °C |
Δm/Δt, mg/min |
Vapour pressure, Pa |
1 |
26.9 |
1.8577 |
4.7596 x 1E+2 |
2 |
30.0 |
2.4632 |
6.3435 x 1E+2 |
3 |
33.0 |
3.5810 |
9.2677 x 1E+2 |
4 |
36.0 |
4.9791 |
1.2949 x 1E+3 |
5 |
39.0 |
6.6363 |
1.7342 x 1E+3 |
6 |
42.0 |
8.6756 |
2.2781 x 1E+3 |
Description of key information
The vapour pressure of the test item was determined at 20, 25 and 50 °C to be 214.2 Pa, 380 Pa and 5115 Pa, respectively.
Key value for chemical safety assessment
- Vapour pressure:
- 214.2 Pa
- at the temperature of:
- 20 °C
Additional information
A study was conducted according to OECD TG 104, Regulation (EC) No 440/2008 method A.4 and OPPTS 830.7950 to determine the vapour pressure of the test item. The vapour pressure of the test item was determined at temperatures between 27 and 42 °C using the effusion method (Knudsen cell). For the evaluation the vapour pressure values in the range of 27 to 42 °C were used. The vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C. The vapour pressure was calculated to be 214.1 Pa at 20 °C, 380 Pa at 25 °C and 5115 Pa at 50 °C, respectively.
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