Sodium Hydrosulphite

Appearance: White powder

Chemical Name : Sodium dithionite

Chemical Formula: Na2S2O4

Packaging Type: 25 kg. cans.

Areas of Use:

Sodium hydrosulfite, sodium sulfoxylate and sulfoxylate are also called. Sodium dithionite is not stable under physiological conditions, the decomposition rate increases with increasing acidity. After contact with moisture, it is oxidized to hydrogen sulfide (hso3-), sulfite (so32-) and hydrogen sulfate (hso4-). Under strong acidic conditions, it can release sulfur dioxide. Under anaerobic conditions (such as in the lower gastrointestinal tract), hydrogen sulfide (hso3-) and thiosulfate (s2o32-) can be formed. Hydrogen sulfide (hso3-) can be absorbed after ingestion. It is effectively metabolized and most of it is rapidly excreted in the urine as sulfate.

Sodium hydrosulphite is widely used in industry due to its reducing properties and its ability to react with oxygen. It is used in the textile industry as a reducing bleaching agent for dyeing, in the pulp and paper industry to remove yellow color changes from cellulose-based products, as an oxygen scavenger in boilers, in preservation and water treatment to remove iron stains on cultural artifacts. Iron flash control on white fabrics in bleaching media. It is also used in photographic film, clay, wine, leather goods, food and beverages, polymers, cleaners, gas cleaning, environmental remediation, metal recovery and chemical processing.

Areas of Use

• In the textile industry, it provides a reductive reaction with the dye remaining on the fiber after dyeing, thus removing excess dye from the fiber.
• In the paper industry, it is used to bleach paper pulp.
• In the food industry, it is used to bleach sherbet and maltose.
• It is used in water conditioning, in the bleaching of minerals by removing iron ions, as a sulfonation agent and sodium source in chemical production, and in the purification of gases.