Name: Sodium Sulfite
SKU: 6937aedd820f4b62a93c4971
Availability: InStock

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Sodium Sulfite

Sodium Sulfite is a white, water-soluble inorganic salt widely used in water treatment, pulp and paper processing, photographic applications, chemical manufacturing, and food preservation. It serves as an effective oxygen scavenger, preservative, and chemical intermediate.

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Key Characteristics

Chemical Name: Sodium Sulfite
Chemical Formula: Na₂SO₃
Appearance: White crystalline powder
Odour: Odorless
Purity Grades: Industrial grade, technical grade, food grade
Molecular Weight: 126.04 g/mol
Density: 2.63 g/cm³
Melting Point: 33°C (decomposes on further heating)
Boiling Point: Decomposes at high temperatures
Solubility: Highly soluble in water
Stability: Stable under normal conditions; oxidizes slowly to sodium sulfate upon exposure to air
Hazard Nature: Low hazard; may cause irritation to skin, eyes, or respiratory system in dust form

Functional Properties

Strong reducing agent for chemical and industrial processes
Effective oxygen scavenger in water and boiler systems
Preservative and antioxidant in food and beverage applications
Prevents oxidation of dyes, chemicals, and photographic materials
Acts as a chemical intermediate for sodium thiosulfate and other sulfur compounds
Improves storage stability of certain industrial and laboratory products

Common Applications
Water & Wastewater Treatment

Removes dissolved oxygen to prevent corrosion in boilers and pipelines
Maintains redox balance in industrial water systems

Pulp & Paper Industry

Dechlorination and bleaching agent
Stabilizes color and prevents oxidative damage during pulp processing

Chemical Manufacturing

Intermediate in production of sodium thiosulfate, sulfur dioxide, and other sulfur compounds
Used as reducing agent in chemical synthesis

Food & Beverage

Acts as antioxidant and preservative
Prevents discoloration and oxidation in food products

Photography

Used in photographic developers and fixers
Enhances stability of photographic emulsions

Other Industrial Uses

Textile industry: protects dyes from oxidation
Leather industry: used in tanning and bleaching processes
Laboratory reagent for redox reactions

Advantages

Strong reducing properties for water treatment and chemical processes
Stable and reliable under normal storage conditions
Highly soluble for rapid processing
Versatile across water treatment, food, chemical, and industrial applications
Cost-effective and easy to handle
Protects materials from oxidative damage in industrial and laboratory uses

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Sodium Sulfite

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