Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Endpoint summary

Currently viewing:

Administrative data

Description of key information

Under environmental relevant conditions, ammonium hydrogen sulfite readily dissociates into sulfite anions and ammonium cations in aqueous solution. Sulfite anions and ammonium cations are not stable under typical environmental conditions. Environmental transformation reactions for sulfite include oxidation and reduction depending on the environmental conditions resulting in sulfides and sulfates. Thus, hydrolysis and photodegradation are not relevant as ammonium hydrogen sulfite dissociates rapidly and is transformed e.g. by oxidation, reduction, speciation, precipitation in environmental solutions.

Additional information