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EC number: 807-577-5 | CAS number: 1182844-21-8
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:
- 2013-07-01
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- effusion method: Knudsen cell
- Key result
- Test no.:
- #1
- Temp.:
- 20 °C
- Vapour pressure:
- 0 Pa
- Key result
- Test no.:
- #2
- Temp.:
- 25 °C
- Vapour pressure:
- 0 Pa
- Key result
- Test no.:
- #3
- Temp.:
- 125 °C
- Vapour pressure:
- 0 Pa
- Conclusions:
- The vapour pressure at 20, 25 and 50 °C was determined to be 1.76E-9, 4.54E-9 and 3.37E-7 Pa, respectively.
- Executive summary:
A study was conducted according to OECD TG 104 and Regulation (EC) No 440/2008 method A.4 to determine the vapour pressure of the test item. The vapour pressure of the test item was determined at different temperatures (115 - 140 °C) using the effusion method (weight loss). The vapour pressure was calculated using the linear regression equation of the Log P versus 1/T function. The values for 20, 25 and 50 °C were calculated using the Antoine equation. The vapour pressure at 20, 25 and 50 °C was determined to be 1.76E-9, 4.54E-9 and 3.37E-7 Pa, respectively.
Reference
The vapour pressure was measured twice. The first measurement was performed in the temperature range of 115 °C to 140 °C.
Temperature / °C |
Vapour pressure / hPa |
115 |
2.2E-5 |
120 |
3.2E-5 |
125 |
3.8E-5 |
130 |
9.9E-5 |
135 |
1.5E-4 |
140 |
2.7E-4 |
Antoine parameters and extrapolated vapour pressures
T / ° C |
p / hPa |
log (p/hPa) = A + B/(C+T[°C]) |
20 |
1.7E-11 |
A = 13.83698 |
25 |
4.54E-11 |
B = -7209.22 |
50 |
3.37E-9 |
C = 273.15 |
The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C
Description of key information
The vapour pressure at 20, 25 and 50 °C was determined to be 1.76E-9, 4.54E-9 and 3.37E-7 Pa, respectively.
Key value for chemical safety assessment
- Vapour pressure:
- 0 Pa
- at the temperature of:
- 25 °C
Additional information
A study was conducted according to OECD TG 104 and Regulation (EC) No 440/2008 method A.4 to determine the vapour pressure of the test item. The vapour pressure of the test item was determined at different temperatures (115 - 140 °C) using the effusion method (weight loss). The vapour pressure was calculated using the linear regression equation of the Log P versus 1/T function. The values for 20, 25 and 50 °C were calculated using the Antoine equation.The vapour pressure at 20, 25 and 50 °C was determined to be 1.76E-9, 4.54E-9 and 3.37E-7 Pa, respectively.
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