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EC number: 201-075-4 | CAS number: 78-00-2
Vapour pressure
Administrative data
Link to relevant study record(s)
Description of key information
Two studies are referenced and both showed a similar vapour pressure result. Furthermore, use of the EPISuite v4.0 software calculates vapour pressure using three different methods and quotes a further experimental value that are all consistent with using 0.34 hPa as a weight of evidence based value for this endpoint
Key value for chemical safety assessment
- Vapour pressure:
- 0.34 hPa
- at the temperature of:
- 20 °C
Additional information
Two experimental studies are referenced and both studies showed a very similar vapour pressure result. Full details of the methods used are not available but the closeness of the results allows us to use 0.34 hPa at 20°C as the weighted evidence result.
In addition, use of the EPISuite v4.0, MPBPVP (v1.43) software calculates vapour pressure using three different calculation methods giving results in the range of 57.7 to 67.7 Pa at 25°C. An average of 62.7 Pa at 25°C based on the average of two out of three calculation methods is selected by the software. This is compared to a quoted experimental VP result of 34.7 Pa at 20°C which is referenced to Wang Y et al, 1996.
This calculated set of vapour pressure data and the experimental value of Wang is consistent with other studies after allowing for test temperature differences. Therefore it is considered suitable for use as part of the weight of evidence used for this endpoint
Further test work would require sophisticated, advanced and non-routine handling of test samples and it could arise in hazardous testing conditions. As such, no further testing is planned
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