25kg bag packaging of Sodium Sulphite
25kg bag packaging of Sodium Sulphite

Sodium Sulphite

Sodium Sulphite (≥ 90.0%) is a highly efficient reducing agent. In the concrete admixture industry, it serves as an essential auxiliary stabilizer during Polycarboxylate Ether (PCE) superplasticizer synthesis, effectively regulating molecular weight and preventing over-oxidation. It is also widely utilized in industrial water treatment, pulp bleaching, and textile processing.

Product Description

Appearance:

White or light yellow powder.

 

Specifications (90% Industrial Grade):

Item Technical Standard
Purity / Main Content ≥90.0%
Iron (Fe) ≤0.005%
Water Insoluble Matter ≤0.1%
Free Alkali ≤0.6%
Sodium Sulfate ≤8.0%

 

Applications:

Concrete Admixture Industry: Functions as an efficient reducing agent and auxiliary stabilizer during the polymerization of Polycarboxylate Ether (PCE) superplasticizers. It helps regulate molecular weight distribution, preventing over-oxidation of monomers and ensuring consistent water-reducing performance.

Water Treatment: Widely utilized as an oxygen scavenger and dechlorination agent in industrial boilers and water treatment systems to prevent oxidative corrosion of piping and equipment.

Pulp & Paper Industry: Serves as a bleaching agent and an essential chemical in the semi-chemical pulping process to remove lignin and improve paper strength.

Textile & Leather Industry: Applied as an antichlor to eliminate residual chlorine after bleaching, and as a reducing agent in dyeing, printing, and leather tanning processes to stabilize colors.

Chemical & Photography: Used as an intermediate in chemical manufacturing and as a preservative in photographic developing solutions to prevent the oxidation of developer agents.

 

Safety & Handling:

Precautions: Avoid breathing dust. In contact with acids, it liberates toxic sulfur dioxide gas. Ensure adequate ventilation and wear personal protective equipment (PPE) including protective gloves, dust masks, and safety glasses during handling.

 

Packaging & Storage:

Standard Packaging: 25kg PP woven bags with PE inner liner, or 1000kg Jumbo bags.

Custom Service: Customized packaging and private labeling are available upon request.

Storage Recommendations: Store in a cool, dry, and well-ventilated warehouse.

Keep away from direct sunlight, moisture, and heat sources.

Must be stored strictly apart from strong acids and oxidizing agents.

Ensure bags are tightly sealed, as exposure to air will gradually oxidize the product into sodium sulfate .

Shelf Life: 12 months (under tightly sealed and dry conditions).

 

 

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