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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

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Administrative data

Description of key information

Potassium thiosulfate has a low potential to partition into air based on the low vapour pressure of ionic solutions and does not sublime.

Under environmental relevant conditions, potassium thiosulfate readily dissociates into thiosulfate anions and potassium cations in aqueous solution. Thiosulfates 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 potassium thiosulfate dissociates rapidly and is transformed e.g. by oxidation, reduction, speciation, precipitation in environmental solutions.

Additional information