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EC number: 289-108-9 | CAS number: 86014-62-2
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:
- 27 March 2017 - 28 November 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- Main study was conducted in accordance with international guidelines and in accordance with GLP. All guideline validity criteria were met.
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Version / remarks:
- Regulation (EC) 440/2008 of 30 May 2008
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Version / remarks:
- 23 March 2006
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: OECD Guideline 113 (Screening Test for Thermal Stability and Stability in Air)
- Version / remarks:
- 12 May 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 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Temp.:
- 50 °C
- Vapour pressure:
- 0.002 Pa
- Transition / decomposition:
- no
- Remarks:
- No thermal effects were determined up to 300 °C.
- Conclusions:
- The vapour pressure of the test item was calculated using the effusion method (vapour pressure balance) in accordance with test guideline EU A.4 and OECD guideline 104 (2006).
The vapour pressure was calculated by extrapolation of measured vapour pressure data for 20 ̊C (VP = 0.00018 Pa), 25 ̊C (VP = 0.00027 Pa) and 50 ̊C (VP = 0.0018 Pa). - Executive summary:
EU Method A.4. – The vapour pressure of the test item was determined utilising the effusion method (vapour pressure balance). The procedure employed was designed to be compatible with Method A.4. Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008.
The vapour pressure of the test item was measured across a temperature range of 40 to 56 °C. Values measured across this range showed a good linear response. The test item vapour pressure at 20 °C, 25 °C and 50 °C was extrapolated from a regression of measured values.
The vapour pressure of the test item has been determined to be 1.8 x 10-4 Pa at 20.0 °C.
Reference
Table 2: Results Thermal Stability
No. |
Sample weight / mg |
Start / °C |
Energy / J/g |
Remark |
PN13301 |
4.00 |
--- |
--- |
No thermal effects observed. |
Table 3: Results of Effusion method: Vapour pressure balance
No. |
Temperature / °C |
Vapour pressure / Pa |
1 |
40 |
8.60 × 10-4 |
2 |
43 |
1.09 × 10-3 |
3 |
46 |
1.39 × 10-3 |
4 |
49 |
1.69 × 10-3 |
5 |
52 |
2.02 × 10-3 |
6 |
56 |
2.69 × 10-3 |
From the measured data points of the vapour pressure curve the constants A and B of the Antoine equation
log10p = A + B/T = A + B/(C+t)
can be derived by regression of the data points to
T = temperature in Kelvin
t = temperature in Celsius
A = 7.0059
B = -3151.59
C = 273.15.
The vapour pressure of the dried test item was calculated by interpolation and extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C.
Table 4: Calculated Vapour Pressure of the Test Item at 20 °C, 25 °C and 50 °C.
Temperature / °C |
Vapour pressure / Pa |
20 |
1.8 × 10-4 |
25 |
2.7 × 10-4 |
50 |
1.8 × 10-3 |
Description of key information
Vapour Pressure: 0.00018 Pa at 20°C; EU Method A.4.; H Smeykal (2017)
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 20 °C
Additional information
EU Method A.4. – The vapour pressure of the test item was determined utilising the effusion method (vapour pressure balance). The procedure employed was designed to be compatible with Method A.4. Vapour Pressure of Commission Regulation (EC) No 440/2008 of 30 May 2008.
The vapour pressure of the test item was measured across a temperature range of 40 to 56 °C. Values measured across this range showed a good linear response. The test item vapour pressure at 20 °C, 25 °C and 50 °C was extrapolated from a regression of measured values.
The vapour pressure of the test item has been determined to be 1.8 x 10-4 Pa at 20.0 °C.
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