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EC number: 484-460-1 | CAS number: 37859-55-5
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:
- 25 March 2014
- 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
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- effusion method: vapour pressure balance
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 0.017 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- 0.034 Pa
- Conclusions:
- Vapour pressure of test item at 20ºC was 0.0172 Pa.
Vapour pressure of test item at 25 ºC was 0.0343 Pa. - Executive summary:
The vapour pressure study using effusion method was based on the method EEC A4 (based on the method OECD 104). At 20 ºC and 25ºC the determined vapour pressure was 1.72E-02 Pa and 3.43E-02 Pa respectively.
Reference
Vapour pressure was calculated on the basis of equation log (p) = f (1/t) = a-b/(t+273.15) where p – vapour pressure in Pa, t temperature in ºC, obtained for four measurement points: 45.20 ºC, 49.20 ºC, 54.60 ºC and 60.40 ºC
Temperature (ºC) [t] |
Vapour pressure (Pa) [P] |
Evaporation rate (ug/min) |
45.20 |
0.44 |
6.18 |
49.20 |
0.71 |
9.90 |
54.60 |
1.35 |
18.50 |
60.40 |
2.48 |
33.80 |
a= 16.1062
b = 5238.90
R2= 0.9835
Description of key information
Key study: EEC A4 (OECD 104). Vapour pressure at 20ºC was 0.0172 Pa.
Key value for chemical safety assessment
- Vapour pressure:
- 0.017 Pa
- at the temperature of:
- 20 °C
Additional information
Key study: The vapour pressure study using effusion method was based on the method EEC A4 (based on the method OECD 104). At 20 ºC and 25ºC the determined vapour pressure was 1.72E-02 Pa and 3.43E-02 Pa respectively.
Supporting study: The vapour pressure of MPKO was performed was performed in accordance with OECD Guideline 104 and EU Method A.4. The vapour pressure at 20°C was 0.214 kPa.
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