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EC number: 208-704-1 | CAS number: 538-75-0
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:
- April 28, 2016
- 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: Knudsen cell
- Key result
- Temp.:
- 20 °C
- Vapour pressure:
- 1.15 Pa
- Temp.:
- 25 °C
- Vapour pressure:
- 1.92 Pa
- Conclusions:
- The vapour pressure of the test item is 1.15 Pa at 20 ºC and 1.92 Pa at 25 ºC.
- Executive summary:
The vapour pressure of the test item was determined by the effusion method (Knudsen cell), according to OECD 104 and EU A.4 method (GLP study). The vapour pressure of the test item was determined to be 1.15 Pa at 20ºC and 1.92 Pa at 25ºC.
Reference
Table 1. Experimental values.
Temperature ºC |
Vapour pressure (Pa) |
Evaporation rate (µg/min) |
38.40 |
6.99 |
5.44 |
43.00 |
10.86 |
8.39 |
47.80 |
16.94 |
12.98 |
52.70 |
24.85 |
18.90 |
From these values the following equation was obtained: log (p) = a-b/(t+273.15) where "a" was 13.4503 and "b" was 3925.66, with a R2 value of 0.9939. The calculated Vapour Pressure at 20ºC and 25ºC was 1.15 Pa and 1.92 Pa, respectively.
Vapour pressure at 20ºC (Pa) |
Vapour pressure at 25ºC (Pa) |
1.15 |
1.92 |
Description of key information
Key study. Method according to OECD 104 and EU Method A.4 (Knudsen cell), GLP study. The vapour pressure of the test item is 1.15 Pa at 20ºC and 1.92 Pa at 25ºC.
Key value for chemical safety assessment
- Vapour pressure:
- 1.15 Pa
- at the temperature of:
- 20 °C
Additional information
The vapour pressure of the test item was determined by the effusion method (Knudsen cell), according to OECD 104 and EU A.4 method (GLP study). The vapour pressure of the test item was determined to be 1.15 Pa at 20ºC and 1.92 Pa at 25ºC.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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