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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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



Category name:

Justifications and discussions

Category definition:
Category description:
Category rationale:
In a category approach, read-across is used among a number of structurally similar/identical substances, i.e. soluble sulfite substances. The structural similarity is based on the fact that the common (eco)toxicological moiety of concern is the sulfite/hydrogensulfite anion which is either present in the substance as such or is formed as degradation product of unstable substance analogues (e.g. thiosulfates, dithionites) under environmental or physiological conditions.
Within this category, because of the structural similarity, the specified toxicological and ecotoxicological properties are similar.
The similarity rules specified in Annex XI, Section 1.5 of the REACH Regulation in the REACH Guidance on IR & CSA, Chapter R.6 of apply and the category ”sulfites/thiosulfates/ dithionite” is formed.