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EC number: 695-696-1 | CAS number: 124763-51-5
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:
- 2020-06-10 to 2020-06-20
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2006
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- 2009
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: Knudsen cell
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Key result
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Conclusions:
- The mean vapour pressure of the test item was found to be and 5.494 x 10-8 Pa at 25 °C.
- Executive summary:
The vapour pressure of the test item was determined using theKnudsen Effusion Methodaccording to Regulation (EC) No. 440/2008 Method A.4. Vapour pressure and OECD Test Guideline 104 (2006). The vapour pressure between 90 and 150 °C was plottedagainst the inverse temperature. The vapour pressures at 20 and 25 °C were calculated by extrapolation to be1.971 x 10-8 Pa and 5.494 x 10-8 Pa, respectively.
Reference
Temperature, °C |
Δm/Δt, mg/min |
Vapour pressure, Pa |
90.0 |
1.4727 x 10-5 |
3.0768 x 10-3 |
100.0 |
2.7070 x 10-5 |
5.7329 x 10-3 |
110.0 |
1.5960 x 10-4 |
3.4251 x 10-2 |
120.0 |
6.7927 x 10-4 |
1.4766 x 10-1 |
130.0 |
2.2261 x 10-3 |
4.9002 x 10-1 |
140.0 |
5.2124 x 10-3 |
1.1615 |
150.0 |
8.3642 x 10-3 |
1.8863 |
For the evaluation the measured vapour pressure values were plotted against the inverse temperature. The linear regression lead to following results.
Intercept |
Slope |
R. Squared |
18.8488 |
-7784.3730 |
0.9822 |
The vapour pressures at 20 and 25 °C were calculated by extrapolation to be1.971 x 10-8Pa and 5.494 x 10-8Pa, respectively.
Description of key information
The mean vapour pressure of the test item was found to be 5.494 x 10-8 Pa at 25 °C (reference 4.6 -1).
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
The vapour pressure of the test item was determined using the Knudsen Effusion Method according to Regulation (EC) No. 440/2008 Method A.4. Vapour pressure and OECD Test Guideline 104 (2006). The vapour pressure between 90 and 150 °C was plotted against the inverse temperature. The vapour pressures at 20 and 25 °C were calculated by extrapolation to be1.971 x 10-8 Pa and 5.494 x 10-8 Pa, respectively.
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