Products / Sodium Sulfite

Sodium Sulfite

Na₂SO₃

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.

White sodium sulfite powder in a glass dish

Properties

Chemical formula: Na₂SO₃
Molecular weight: 126.05
Bulk density: 1.2–1.5 g/cc
Appearance, 20% solution: Clear and colorless
CAS number: 7757-83-7
HS code: 28321090

Specifications

Two grades

Parameter	Unit	Limit	Chemical	Technical
Assay% w/w, Min	% w/w	Min	98	97
Sulfates% w/w, Max	% w/w	Max	1.5	2.0
Moisture% w/w, Max	% w/w	Max	0.2	0.2
pH of 10% solutionAt 20 °CRange		Range	9.5–10.5	9.5–10.5
FeIronppm, Max	ppm	Max	20	20

Settling tanks at a water treatment plant

Packaging

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

Applications

What it is used for

Pulp and paper

Production of chemical-thermo-mechanical pulp.
Kraft pulping process.

Water treatment

Oxygen scavenger in boiler water and oil drilling water.
Antichlor for de-chlorination of municipal and industrial wastewater.
Effluent treatment plants.
Desalination plants for production of potable water.

Others

Preservative and antioxidant in food processing.
Flue gas desulfurization.
Production of dyes in the dyestuffs industry.
Bleaching in the textiles industry.
Antibacterial agent in the leather tanning process.
Preservative in natural latex rubber.
Pharmaceuticals and chemicals manufacturing.

Storage

Store the product in a dry and cool place. It oxidizes to sodium sulfate on exposure to air.

Handling

The product can be handled by conventional methods.

Ask for a quotation or a technical data sheet

Tell us the grade and quantity you need. We also make Sodium Hydrosulfite.

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