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EC number: 617-001-2 | CAS number: 80207-00-7
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:
- 2015
- 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:
- not specified
- Type of method:
- effusion method: by loss of weight or by trapping vaporisate
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.004 Pa
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 0.005 Pa
- Conclusions:
- The vapour pressure of the test substance is 0.00408 Pa at 20°C and 0.0055 Pa at 25°C.
- Executive summary:
A study was conducted to determine the vapour pressure of the test substance using the effusion method according to OECD Guideline 104 and EU Method A.4. Under the study conditions, the vapour pressure of the test substance was 0.00408 Pa at 20°C and 0.0055 Pa at 25°C (Henke, 2015).
Reference
Evaluation
The measured values for temperature and vapour pressure were evaluated as follows:
Table 2: Evaluation of calculated values
Parameter |
T |
P |
1/T |
log p |
Unit |
K |
Pa |
1/K |
log Pa |
Values |
303.2 |
7.58E-03 |
3.2982E-03 |
-2.1202 |
318.2 |
1.68E-02 |
3.1427E-03 |
-1.7737 |
|
333.2 |
3.75E-02 |
3.0012E-03 |
-1.4263 |
In this table, E-0x represents *10 -x.
The following vapour pressures were determined experimentally and considered as valid (mean and standard deviation given):
Table 3: Experimentally determined vapour pressures
T |
T |
P |
Standard deviation P |
RSD P |
°C |
K |
Pa |
Pa |
% |
30.0 |
303.2 |
7.58E-03 |
6.79E-04 |
8.9% |
45.0 |
318.2 |
1.68E-02 |
3.31E-03 |
19.6% |
60.0 |
333.2 |
3.75E-02 |
7.47E-03 |
19.9% |
Validity:
The linear regression of log p vs. 1/T gave a correlation coefficient r of - 0.9996, showing good repeatability and precision. Therefore, the determination is considered as valid.
Description of key information
The vapour pressure was determined according to OECD Guideline 104 (Henke, 2015).
Key value for chemical safety assessment
- Vapour pressure:
- 0.004 Pa
- at the temperature of:
- 20 °C
Additional information
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