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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

Endpoint summary

Administrative data

Description of key information

Potassium sulfite (K2SO3, Molecular weight 158.26), CAS 10117 -38 -1 is a colourless hexagonal crystalline solid.

No melting temperature was found between 20 °C and 590 °C. The melting point of the test substance, Potassium sulfite, is greater than 590 °C.

The relative density of potassium sulfite at 20 °C is 2.353.

The water solublity of potassium sulfite is 1060 g/L at 25 °C.

Additional information