Registration Dossier
Registration Dossier
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EC number: 231-197-3 | CAS number: 7446-11-9
Vapour pressure
Administrative data
Link to relevant study record(s)
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Guideline:
- other: Not reported
- Type of method:
- other: Not specified
- Key result
- Temp.:
- 25 °C
- Vapour pressure:
- 97.3 hPa
- Remarks on result:
- other: alpha form
- Temp.:
- 25 °C
- Vapour pressure:
- 458.6 hPa
- Remarks on result:
- other: beta form
- Temp.:
- 25 °C
- Vapour pressure:
- 577.2 hPa
- Remarks on result:
- other: gamma form
- Conclusions:
- At 25°C the sulphur trioxide vapour pressure is 97.3 to 577.2 hPa depending on the polymeric form.
- Executive summary:
The vapour pressure of sulphur trioxide varies with the polymeric state of the substance. The vapour pressure is 97.3 to 577.2 hPa at 25 °C, depending on the polymeric form.
Reference
Description of key information
The vapour pressure of sulphur trioxide varies with the polymeric state of the substance. At 25 °C the vapour pressure is 97.3 to 577.2 hPa depending on the polymeric form.
Key value for chemical safety assessment
- Vapour pressure:
- 9 730 Pa
- at the temperature of:
- 298 K
Additional information
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