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EC number: 221-800-8 | CAS number: 3238-40-2
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:
- 01 July 2011- 21 October 2011
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- (2009)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- (2006)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: by loss of weight or by trapping vaporisate
- Remarks:
- (Isothermal thermogravimetric effusion method)
- Temp.:
- 20 °C
- Vapour pressure:
- 1.9 other: E-10 Pa
- Remarks on result:
- other: 1.4E-12 mm Hg
- Temp.:
- 25 °C
- Vapour pressure:
- 5.6 other: E-10 Pa
- Remarks on result:
- other: 4.2E-12 mm Hg
- Conclusions:
- The vapour pressure of FDCA at 20°C is 1.9E-10 Pa.
The vapour pressure of FDCA at 25°C is 5.6E-10 Pa.
Reference
A representative weight loss curve of the test substance is shown in Figure 7 (see attachment). The plot of the log PTof the test substance as function of the reciprocal temperatures is shown in Figure 8 (see attachment). Equation: log PT,20= -8212 x 1/T + 18.3 (r = 0.9998, n = 8).
Table: Results of the isothermal TGA analysis
Temperature |
Weight loss |
νT |
log νT |
log PT |
PT |
|
|
|
|
|
|
210 |
18.98 |
2.27*10-3 |
-2.64 |
1.28 |
19.2 |
|
19.30 |
2.30*10-3 |
-2.64 |
1.29 |
19.5 |
|
|
|
|
|
|
220 |
38.51 |
4.60*10-3 |
-2.34 |
1.64 |
43.4 |
|
38.75 |
4.63*10-3 |
-2.33 |
1.64 |
43.7 |
|
|
|
|
|
|
230 |
75.33 |
8.99*10-3 |
-2.05 |
1.97 |
94.3 |
|
74.86 |
8.94*10-3 |
-2.05 |
1.97 |
93.7 |
|
|
|
|
|
|
240 |
139.1 |
1.66*10-2 |
-1.78 |
2.28 |
192 |
|
137.2 |
1.64*10-2 |
-1.79 |
2.28 |
189 |
|
|
|
|
|
|
log PT of the test substance at 20°C: -9.72; log PT of the test substance at 25°C: -9.25
Description of key information
The vapour pressure of the substance is 5.6E-10 Pa at 25°C (1.9E-10 Pa at 20°C)
Key value for chemical safety assessment
Additional information
Key value for CSA: 5.6E-10 Pa at 25°C
The isothermal thermogravimetric effusion method was performed in accordance with EC A.4 and OECD 104.
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