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Environmental fate & pathways

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Sodium dithionite has a very low vapour pressure and does not sublime. Under environmental relevant conditions, sodium dithionite readily dissociates into dithionite anions and the respective sodium cations in aqueous solution or in contact with soil moisture. Dithionite anions are not stable under typical environmental conditions. Environmental transformation reactions include oxidation and reduction depending on the environmental conditions resulting in sulfides and sulfates. Thus, hydrolysis and photodegradation are not relevant as sodium dithionite dissociates rapidly and is transformed e.g. by oxidation, reduction, speciation, precipitation in environmental solutions.


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