Sodium Sulfite

Overview Specifications Packaging & Applications Storage & Handling

Gulshan Sodium Sulfite is a white to slightly off-white, free flowing, crystalline and odorless powder. It is soluble in water and sparingly soluble in alcohol.

Chemical FormulaNa2So3
Molecular Weight126.05
Bulk Density 1.2-1.5 g/cc
Appearance (20% Solution) Clear and Colorless
CAS Number7757-83-7
HS Code28321090


Assay % w/w Min9897
Sulfates % w/w Max1.52.0
Moisture % w/w Max0.20.2
pH of 10% Solution (20 0C)9.5-10.59.5-10.5
Fe ppm Max2020


25 Kg and 50 Kg HDPE woven bags with heat sealed inner liner



For production of chemical-thermo-mechanical pulp and in Kraft pulping process.


In boiler water and oil drilling water as oxygen scavenger; In de-chlorination of municipal and industrial wastewater as antichlor; In effluent treatment plants; In desalination plants for production of potable water.


In food processing as preservative and antioxidant; In flue gas desulfurization; In dyestuffs industry for production of dyes; In textiles industry for bleaching; As antibacterial agent in leather tanning process; As preservative in natural latex rubber; In pharmaceuticals and chemicals manufacturing.

Storage and Handling

Store the product in a dry and cool place. It oxidizes to Sodium Sulfate on exposure to air. Product can be handled by conventional methods.

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