Na2SO3 - Sodium sulfite

Molecular Formula: Na2SO3
Synonyms:
  • Sodium sulfite anhydrous; disodium sulfite; Natrii Sulphis; Natrium Sulfurosum; Natriumsulfit; sulfurous acid, disodium salt; exsiccated sodium sulfite; Sodium sulfite (2:1); Sulfurous acid, sodium salt
Description:
  • Sodium Sulfite is a White crystalline or powder; readily soluble in water, decomposes on heating. It is prepared from sulfur dioxide and sodium carbonate or caustic soda. It is a strong reducing agent and reacts with oxidants.
Packing and storage: In 25kg, store at a cool, dry and well ventilated place.
Origin: Italia; Thailand.
Uses:
  • It is primarily used in pulp and paper industry. It is used in water treatment as an oxygen scavenger agent , in the photographic industry to protect developer solutions from oxidation, in textile industry as a bleaching, as a desulfurizing and as a dechlorinating agent and in leather trade for the sulfitization of tanning extracts.
  • It is used in chemical manufacturing as a sulfonation and sulfomethylation agent.
  • It is used in the production of sodium thiosulfate.
  • It is use in other applications include ore flotation, oil recovery, food preservative, making dyes, and detergent. It forms a bisulfite adduct with aldehyde and with ketones to a sulfonic acid. It is used to purify or isolate aldehydes and ketones.