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EC number: 231-964-2 | CAS number: 7782-78-7
Vapour pressure
Administrative data
- Endpoint:
- vapour pressure
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- November 30, 2009 - February 16, 2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Study was performed in accordance with the OECD Guideline 104, and EU Method A.4.
Cross-reference
- Reason / purpose for cross-reference:
- reference to same study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 010
- Report date:
- 2010
Materials and methods
Test guidelineopen allclose all
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 104 (Vapour Pressure Curve)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.4 (Vapour Pressure)
- Deviations:
- no
- Principles of method if other than guideline:
- Not applicable.
- GLP compliance:
- no
- Remarks:
- Not required by the authority
- Type of method:
- dynamic method
Test material
- Reference substance name:
- Nitrosylsulphuric acid
- EC Number:
- 231-964-2
- EC Name:
- Nitrosylsulphuric acid
- Cas Number:
- 7782-78-7
- Molecular formula:
- HNO5S
- IUPAC Name:
- hydroxy(nitrosooxy)sulfane dioxide
- Test material form:
- other: liquid
- Details on test material:
- Identity: Confirmed by density
Storage: RT, dry
Expiry Date: November 20, 2011
Constituent 1
Results and discussion
Vapour pressureopen allclose all
- Temp.:
- 20 °C
- Vapour pressure:
- 0.026 hPa
- Remarks on result:
- other: Calculated value (Antoine constants)
- Temp.:
- 25 °C
- Vapour pressure:
- 0.041 hPa
- Remarks on result:
- other: Calculated value (Antoine constants)
- Temp.:
- 50 °C
- Vapour pressure:
- 0.3 hPa
- Remarks on result:
- other: Calculated value (Antoine constants)
Any other information on results incl. tables
The DSC-measurements in a closed glass crucible with the test item showed na exothermal effect in the temperature range 25 — 500 °C.
The vapour pressure was measured with the dynamic method in the temperature range of 115 °C to 205 °C. The measured vapour pressures at the corresponding temperatures are listed in the following table:
Temperature / °C Vapour pressure / hPa
114.9 10.1
147.8 52.8
170.5 100.5
203.3 200.5
205.0 293.0
Applicant's summary and conclusion
- Conclusions:
- The values for 20, 25 and 50 °C are calculated, using the Antoine constants A, B and C.
- Executive summary:
The study was performed in accordance with the OECD Guideline 104, and EU Method A.4 in year 2009/2010.
The Antoine constants from the regression of the data from the dynamic method were used to calculate the vapour pressure for 20, 25 and 50 °C:
T /°C p/hPa p/Pa
20 2.6 x 10-2 2.6 x 10.0
25 4.1 x 10-2 4.1 x 10.0
50 3.0 x 10-1 3.0 x 10.1
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