Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.

Diss Factsheets

Administrative data

Endpoint:
skin corrosion: in vitro / ex vivo
Remarks:
waiver
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the substance is a strong acid (pH ≤ 2.0) or base (pH ≥ 11.5) and the available information indicates that it should be classified as skin corrosion (Category 1, 1A, 1B or 1C)
Justification for type of information:
Sulphur trioxide is the anhydride of sulphuric acid. Moisture from physiological conditions will promote acid formation and rapid dissociatipon to protons and the sulphate ion. This is potenitally corrosive to skin.

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion

Interpretation of results:
Category 1A (corrosive) based on GHS criteria
Conclusions:
Sulphur trioxide is the anhydride of sulphuric acid. Moisture from physiological conditions will promote acid formation and rapid dissociatipon to protons and the sulphate ion. This is potenitally corrosive to skin.
Executive summary:

Sulphur trioxide is classified as corrosive. Sulphur trioxide is the anhydride of sulphuric acid. Moisture from physiological conditions will promote acid formation and rapid dissociatipon to protons and the sulphate ion. This is likely corrosive to skin. Testing is not scientifically defendable or humane with strong acid generator.