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EC number: 836-437-6 | CAS number: 577978-76-8
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 October 2019 to 31 October 2019
- 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
- GLP compliance:
- yes
- Other quality assurance:
- other: Not specified
- Type of method:
- effusion method: isothermal thermogravimetry
- Specific details on test material used for the study:
- No further details specified in the study report
- Key result
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Key result
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Conclusions:
- The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:
20°C
[Pa] [mm Hg]
≤ 1.6 × 10-5 ≤ 1.2 × 10-7
25°C
[Pa] [mm Hg]
≤ 3.0 × 10-5 ≤ 2.2 × 10-7 - Executive summary:
The objective of this study was to determine the vapour pressure of test item CAS 577978 - 76-8, in accordance to OECD test guideline 104, in compliance with GLP.
The isothermal TGA effusion method was applied for the determination of the vapour pressure of CAS 577978-76-8. The weight losses of the test item had to be determined at temperatures above the melting temperature of the test item. According to this, the vapour pressure of the test item could be slightly overestimated and is reported as less than or equal to these values. The vapour pressure of the test item at 20°C (293K) and 25°C (298K) was:
20°C
[Pa] ≤ 1.6 × 10-5, [mm Hg] ≤ 1.2 × 10-7.
25°C
[Pa] ≤ 3.0 × 10-5, [mm Hg] ≤ 2.2 × 10-7.
Reference
Results of the Vapour pressure Isothermal TGA Analysis
Temperature [°C] |
Weight loss [μg/min] |
vr [g/cm2/h] |
log vr |
log Pr |
Pr [Pa] |
140 |
0.826208 |
9.86 x 10-5 |
-4.01 |
0.12 |
1.3 |
0.787779 |
9.40 x 10-5 |
-4.03 |
0.10 |
1.2 |
|
150 |
1.42789 |
1.70 x 10-4 |
-3.77 |
0.39 |
2.4 |
1.37405 |
1.64 x 10-4 |
-3.79 |
0.37 |
2.3 |
|
160 |
2.522252 |
3.01 x 10-4 |
-3.52 |
0.66 |
4.6 |
2.44942 |
2.92 x 10-4 |
-3.53 |
0.65 |
4.5 |
|
170 |
4.32999 |
5.17 x 10-4 |
-3.29 |
0.93 |
8.5 |
4.14315 |
4.95 x 10-4 |
-3.31 |
0.91 |
8.0 |
Vapour Pressure of the Test Item
Temperature [°C] |
log Pr |
Pr [Pa] |
Pr [mm Hg] |
20 |
-4.81 |
1.6 x 10-5 |
1.2 x 10-7 |
25 |
-4.53 |
3.0 x 10-5 |
2.2 x 10-7 |
Description of key information
Vapour Pressure of the Test Item
Temperature [°C] |
log Pr |
Pr [Pa] |
Pr [mm Hg] |
20 |
-4.81 |
1.6 x 10-5 |
1.2 x 10-7 |
25 |
-4.53 |
3.0 x 10-5 |
2.2 x 10-7 |
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 20 °C
Additional information
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