Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
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EC number: 231-197-3 | CAS number: 7446-11-9
Water solubility
Administrative data
- Endpoint:
- water solubility
- Data waiving:
- study technically not feasible
- Justification for data waiving:
- the study does not need to be conducted because the substance is hydrolytically unstable at pH 4, 7 and 9 (half-life less than 12 hours)
- Justification for type of information:
- Sulphur trioxide reacts vigorously and extremely exothermically with water to give sulphuric acid (see reference). Therefore, it is not possible to experimentally determine the water solubility of this substance.
Data source
Reference
- Reference Type:
- review article or handbook
- Title:
- Chemistry of the Elements
- Author:
- Greenwood, N. N.; Earnshaw, N.
- Year:
- 1 984
- Bibliographic source:
- Greenwood, N. N.; Earnshaw, N. Chemistry of the Elements, 2nd ed.; Pergamon Press, UK, 1997; pp 703.
Materials and methods
Results and discussion
Applicant's summary and conclusion
- Conclusions:
- It is not possible to measure the water solubility of sulphur trioxide due to rapid degradation of the substance in water.
- Executive summary:
It is not possible to measure the water solubility of sulphur trioxide due to the repaid degradation of the substance in water.
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