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EC number: 700-548-7 | CAS number: 56138-10-4
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:
- 30-09-2011 to 12-10-2011
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Guideline study performed under GLP. All relevant validity criteria were met.
- 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:
- yes (incl. QA statement)
- Remarks:
- inspected: March 2011; signature: May 2011
- Type of method:
- effusion method: isothermal thermogravimetry
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 0.028 Pa
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 0.054 Pa
- Conclusions:
- The vapour pressure of the test item was determined to be 0.028 Pa at 20°C (293K) and 0.054 Pa at 25°C (298K), respectively.
- Executive summary:
The vapour pressure was determined using the thermogravimetric effusion method in EU Method A.4 and OECD TG 104 under GLP. The vapour pressure of the test item was determined to be: 0.028 Pa (2.1 x10^-4 mmHg) at 20°C (293K) and 0.054 Pa (4.1 x10^-4 mmHg) at 25°C (298K), respectively.
Reference
The results of the isothermal TGA analysis for the test item and the vapour pressure at 20°C and 25°C are given in the following tables.
Table 1: Results of the isothermal TGA analysis
Temperature |
Weight loss |
νT |
log νT |
log PT |
PT |
60 |
4.183 |
4.99 x10^-4 |
-3.30 |
0.52 |
3.3 |
|
4.215 |
5.03 x10^-4 |
-3.30 |
0.53 |
3.4 |
70 |
11.65 |
1.39 x10^-3 |
-2.86 |
1.04 |
11 |
|
10.99 |
1.31 x10^-3 |
-2.88 |
1.01 |
10 |
80 |
26.59 |
3.17 x10^-3 |
-2.50 |
1.45 |
28 |
|
25.07 |
2.99 x10^-3 |
-2.52 |
1.42 |
26 |
90 |
53.91 |
6.44 x10^-3 |
-2.19 |
1.81 |
64 |
|
52.90 |
6.31 x10^-3 |
-2.20 |
1.80 |
63 |
Table 2: Vapour pressure of the test item
Temperature |
log PT |
PT |
PT |
20 |
-1.56 |
2.8 x10^-2 |
2.1 x10^-4 |
25 |
-1.26 |
5.4 x10^-2 |
4.1 x10^-4 |
The plot of the log PT of the test item as function of the reciprocal temperatures was performed. The equation of the curve was: log PT,20 = -5142 × 1/T + 15.98 (r = 0.998, n = 8).
Description of key information
Vapour Pressure: 0.054 Pa at 25 °C, EU Method A.4 - thermogravimetric effusion method, 2012
Key value for chemical safety assessment
- Vapour pressure:
- 0.054 Pa
- at the temperature of:
- 25 °C
Additional information
The vapour pressure was determined using the thermogravimetric effusion method in EU Method A.4 and OECD TG 104 under GLP. The vapour pressure of the test item was determined to be: 0.028 Pa (2.1 x10^-4 mmHg) at 20°C (293K) and 0.054 Pa (4.1 x10^-4 mmHg) at 25°C (298K), respectively.
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