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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The available data on the physical and chemical properties of sodium hydrogensulfite:

Appearance: inorganic, clear aqueous solution.

Relative density at 20 °C: 1.304 (37 wt% aqueous solution).

Solubility in water : 724 g/L at 20 °C (42 wt% in water)

Corrosive to metals: GHS criteria not met (weight loss 13.5 %)

Waivers are proposed for most of the endpoints: melting and boiling point, particle size distribution, vapour pressure, partition coefficient, surface tension, flash point, auto flammability, flammability, explosiveness, oxidising properties, stability in organic solvents, dissociation constant and viscosity, as well as for pyrophoric properties and flammability in contact with water.

Additional information