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EC number: 279-510-2 | CAS number: 80584-99-2
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:
- 2016-08-17 to 2017-02-28
- 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 (incl. QA statement)
- Type of method:
- effusion method: Knudsen cell
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Conclusions:
- In conclusion, the vapour pressure of VOELOFA Monomer was determined in an experimental study conducted according to OECD test guideline 104. A vapour pressure of 1.83E-04 Pa at 20 °C and of 2.66E-04 Pa at 25 °C was caluclated from the regression quotation.
- Executive summary:
The vapour pressure of the test item VOELOFA Monomer was determined at six different temperatures 30, 45, 60, 75, 90 and 105 °C using the effusion method (weight loss) (OECD 104). Three experiments (75, 90 and 105 °C) could be evaluated as they showed relevant and reproducible weight losses. For these temperatures, 1/T was plotted against log P. A vapour pressure of 1.83E-04 Pa at 20 °C and of 2.66E-04 Pa at 25 °C was calculated from the regression quotation for the test item.
Reference
Table 1: Evaluation of calculated values |
||||
Parameter |
T |
Mean P |
1/T |
log P |
Unit |
K |
Pa |
1/K |
Log Pa |
Values |
348.2 |
6.20E-03 |
2.8719E-03 |
-2.2073 |
363.2 |
1.47E-02 |
2.7533E-03 |
-1.8315 |
|
378.2 |
2.78E-02 |
2.6441E-03 |
-1.5566 |
|
A graph with log P vs. 1/T was plotted. Since the values were correlated by a linear relation, the data could be fitted by linear regression.
Table 2: Parameters of linear regression |
|
Parameter |
Value |
Slope |
-2861.0 |
Intercept |
6.0212 |
Correlation coefficient r |
-0.9979 |
Coefficient of determination r2 |
0.9957 |
Table 3: Experimentally determined vapour pressures |
||||
T |
T |
P |
Stand. Dev. P |
RSD P |
° C |
K |
Pa |
Pa |
% |
75.0 |
348.2 |
6.20E-03 |
9.72E-04 |
15.7 |
90.0 |
363.2 |
1.47E-02 |
3.62E-03 |
24.6 |
105.0 |
378.2 |
2.78E-02 |
7.18E-03 |
25.9 |
Stand. Dev. = Standard Deviation; RSD = Relative Standard Deviation
The linear regression of log P vs. 1/T gave a correlation coefficient r of -0.9979, showing good repeatability and precision. Therefore, the determination is considered as valid.
Description of key information
The vapour pressure of the test item VOELOFA Monomer was determined at six different temperatures 30, 45, 60, 75, 90 and 105 °C using the effusion method (weight loss) (OECD 104). Three experiments (75, 90 and 105 °C) could be evaluated as they showed relevant and reproducible weight losses. For these temperatures, 1/T was plotted against log P. A vapour pressure of 1.83E-04 Pa at 20 °C and of 2.66E-04 Pa at 25 °C was calculated from the regression quotation for the test item.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 20 °C
Additional information
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