Chemical Name: Sodium Hydrosulfite, Sodium Hydrosulfide, Sodium Bisulfide, Sodium Sulfhydrate, Sodium Hydrogen Sulfide, Sodium Dithionite
Chemical Formula: Na2S2O4
CAS Number: 7775-14-6
Appearance: Grayish crystalline powder, light-lemon colored flakes
Packaging: Can, drum, IBC Tank, Bulk
definition
Sodium hydrosulfite, also known as sodium dithionite, is a whitish to light yellow crystalline solid with a sulfur dioxide-like odor.
It self-heats upon contact with air and moisture.
This heat may be sufficient to ignite nearby combustible materials.
usage area
Used for dyeing and bleaching pulp.
Sodium hydrosulfite is used as a reducing agent for stripping certain dyes from fabrics and in vat dyeing; as a sugar reducing agent for stripping groundwood pulp, soap, straw, and certain dyes from fabrics during dyeing; and as a bleaching agent for groundwood pulp, soap, straw, and sugar.
All uses of sodium dithionite are based on its reducing properties. In the textile industry, sodium dithionite is primarily used as a reducing agent for vat dyes, sulfur-containing dyes, and for removing pigments from textiles.
It is also used in reductive bleaching processes, such as bleaching mechanical pulp, and as a bleaching agent for cotton, wool, and sugar.
Sodium hydrosulfide is used in paper and cellulose production to break down and whiten wood fibers. This industry frequently uses sodium hydrosulfide in the production of white paper.
Used as a coloring agent in dyeing processes in the leather processing and textile industries. It is also used for bleaching certain textile materials.
Sodium hydrosulfide can be used as a precipitating agent for removing heavy metals in water treatment plants.
Used in photographic processes during the fixing of silver salts.
Used in the production of certain chemical compounds in chemical laboratories and industrial processes.
Sodium hydrosulfide is used as a sweetener in sugary foods in the food processing industry.
Sodium hydrosulfide can be used in the neutralization of bases and pH adjustments.
Sodium hydrosulfide can be used in desulfurization processes in petroleum refineries.