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EC number: 701-473-2 | CAS number: -
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:
- 2018-11-14 to 2018-12-13
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 2006
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- 2009
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7950 (Vapor Pressure)
- Version / remarks:
- 1996
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: OECD Guideline 113 (Thermal Stability)
- Version / remarks:
- 1981
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: vapour pressure balance
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.014 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- 0.018 Pa
- Key result
- Vapour pressure:
- 0.061 Pa
- Conclusions:
- The test item has a vapour pressure of 0.014, 0.018 and 0.061 Pa at 20, 25 and 50 °C, respectively.
- Executive summary:
The vapour pressure of the test item was determined according to OECD guideline 104, EU Method A.4 and OPPTS 830.7950. The vapour pressure was calculated by interpolation and extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C. For the test item a vapour pressure of 0.014, 0.018 and 0.061 Pa at 20, 25 and 50 °C was determined, respectively.
Reference
Thermal Stability
The test item showed three exothermic effects in the temperature
ranges of 110 °C – 160 °C, 170 °C – 200 °C and 250 °C – 300 °C with an
overall decomposition energy of -90 J/g.
Table 1: Results of the DSC-measurement
No. |
Sample weight / mg |
Start of effect/ °C |
Energy2/ J/g |
PN16652 |
9.33 |
110 |
-30 (exothermic) |
Effusion method: Vapour pressure
balance
The vapour pressure was measured in the temperature range of 37 °C
to 68 °C. The measured vapour pressure values together with the
measured temperatures are listed in Table 2.
Table 2: Results of the Effusion method
No. |
Temperature / °C |
Vapour pressure / Pa |
1 |
37 |
3.08 × 10-2 |
2 |
42 |
4.25 × 10-2 |
3 |
47 |
5.64 × 10-2 |
4 |
53 |
7.19 × 10-2 |
5 |
58 |
8.62 × 10-2 |
6 |
68 |
1.28 × 10-1 |
From the measured data points of the
vapour pressure curve the constants A and B of the Antoine equation
can be derived by regression of the data points to
A = 5.1876
B = -2069.18
C = 273.15
The vapour pressure of the test item
calculated by interpolation and extrapolation of the measured vapour
pressure curve for the temperatures 20, 25 and 50 °C, according to
Regulation EC No. 440/2008 Method A.4. Vapour Pressure and OECD Test
Guideline 104 (2006) is shown in Table 3:
Table 3: Calculated vapour pressure values for 20, 25 and 50 °C
Temperature / °C |
Vapour pressure / Pa |
20 |
1.4 × 10-2 |
25 |
1.8 × 10-2 |
50 |
6.1 × 10-2 |
Description of key information
The test item has a vapour pressure of 0.014, 0.018 and 0.061 Pa at 20, 25 and 50 °C, respectively.
Key value for chemical safety assessment
- Vapour pressure:
- 0.014 Pa
- at the temperature of:
- 20 °C
Additional information
The vapour pressure of the test item was determined according to OECD guideline 104, EU Method A.4 and OPPTS 830.7950. The vapour pressure was calculated by interpolation and extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C. For the test item a vapour pressure of 0.014, 0.018 and 0.061 Pa at 20, 25 and 50 °C was determined, respectively.
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