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EC number: 261-699-8 | CAS number: 59323-76-1
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:
- 12-05-2014 to 12-08-2014
- 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:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- inspected: March 2013; signature: May 2013
- Type of method:
- effusion method: isothermal thermogravimetry
- Temp.:
- 20 °C
- Vapour pressure:
- 50 Pa
- Temp.:
- 20 °C
- Vapour pressure:
- 0.38 mm Hg
- Temp.:
- 25 °C
- Vapour pressure:
- 95 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- 0.71 mm Hg
- Conclusions:
- The vapour pressure of the substance was determined to be at 20°C (293K): 50 Pa (0.38 mmHg) and at 25°C (298K): 95 Pa (0.71 mmHg) respectively
- Executive summary:
The vapour pressure was determined using by thermogravic effusion method in EU Method A.4, OECD 104 and EPA OPPTS 830.7950 under GLP. The vapour pressure of the test substance was determined to be at 20°C (293K): 50 Pa (0.38 mmHg) and at 25°C (298K): 95 Pa (0.71 mmHg) respectively.
Reference
The results of the isothermal TGA analysis for the test substance 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 [°C] |
Weight loss [µg/min] |
νT [g/cm2/h] |
log νT |
log PT |
PT [Pa] |
10 |
6.822 7.342 |
8.14 × 10^-4 8.76 × 10^-4 |
-3.09 -3.06 |
1.07 1.11 |
12 13 |
15 |
13.81 14.21 |
1.65 × 10^-3 1.70 × 10^-3 |
-2.78 -2.77 |
1.42 1.44 |
27 27 |
20 |
24.40 24.75 |
2.91 × 10^-3 2.95 × 10^-3 |
-2.54 -2.53 |
1.71 1.71 |
51 52 |
25 |
41.29 40.13 |
4.93 × 10^-3 4.79 × 10^-3 |
-2.31 -2.32 |
1.97 1.95 |
93 90 |
Table 2 Vapour pressure of the test substance
Temperature [°C] |
log PT |
PT [Pa] |
PT [mm Hg] |
20 25 |
1.70 1.98 |
50 95 |
0.38 0.71 |
The plot of the log PT of the test substance as function of the reciprocal temperatures was performed. The equation of the curve was: log PT,20 = -4880 × 1/T + 18.34 (r = 0.998, n = 8).
Description of key information
Vapour Pressure: 50 Pa at 20 °C and 95 Pa at 25 °C, EU Method A.4 - thermogravic effusion method, 2014
Key value for chemical safety assessment
- Vapour pressure:
- 95 Pa
- at the temperature of:
- 25 °C
Additional information
The vapour pressure was determined using by thermogravic effusion method in EU Method A.4, OECD 104 and EPA OPPTS 830.7950 under GLP. The vapour pressure of the test substance was determined to be at 20°C (293K): 50 Pa (0.38 mmHg) and at 25°C (298K): 95 Pa (0.71 mmHg) respectively.
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