Sodium Sulfite Properties, Molecular Formula, Applications - WorldOfChemicals

Sodium Sulfite Properties

Sodium Sulfite

Calsol 550-Molecule 3D Struture
Molecule Structure Image



Sodium sulfite is a soluble sodium salt of sulfurous acid. It is a product of sulfur dioxide scrubbing, a part of the flue gas desulfurization process. It is primarily used in the 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 and to wash fixer from film and photo-paper emulsions, in the textile industry as a bleaching, desulfurizing and dechlorinating agent and in the 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 used in other applications, including froth flotation of ores, oil recovery, food preservatives, making dyes.

Chemical Properties

Appearance White solid
CAS Number 7757-83-7
Crystal Structure Hexagonal
Density 2.633 g/cm3
EINECS Number 231-821-4
HS Code 28321000
IUPAC Name Sodium Sulfite
InChI 1S/2Na.H2O3S/c;;1-4(2)3/h;;(H2,1,2,3)/q2*+1;/p-2
Melting Point 500 ºC
Molar Mass 126.04 g/mol
Molecular Formula Na2SO3
NFPA 704 H-2,F-0,R-0,C-NA
Other_Cations Potassium Sulfite
RTECS Number WE2150000
Related Compounds Sodium Bisulfite;Sodium Metabisulfite;Sodium Sulfate
Synonyms Sodium Sulphite;Sodium Sulfite Anhydrous;Hypo Clear uses cookies to ensure that we give you the best experience on our website. By using this site, you agree to our Privacy Policy and our Terms of Use. X