Sodium Bisulphite Solution 38% Industrial Grade

Sodium Bisulphite Solution 38% Industrial Grade, also known as Sodium Bisulfite or Sodium Hydrogen Sulfite, is a water-soluble inorganic reducing agent widely used in water and wastewater treatment, dechlorination, pulp and paper processing, textile manufacturing, chemical processing, and other industrial applications.

The product has the chemical formula NaHSO₃ and CAS No. 7631-90-5. It is supplied as a clear, colorless to pale-yellow aqueous solution with a Sodium Bisulfite concentration of approximately 38%, subject to the manufacturer's approved specification and batch Certificate of Analysis.

Sodium Bisulphite is particularly valued for its reducing properties. It is commonly used to neutralize residual chlorine and other selected oxidizing agents in industrial processes and water-treatment systems. It may also function as an oxygen-scavenging and process-reducing agent in appropriately designed industrial applications.

Product Information

Product Name: Sodium Bisulphite Solution
Chemical Name: Sodium Bisulfite
Alternative Name: Sodium Hydrogen Sulfite
Chemical Formula: NaHSO₃
CAS No.: 7631-90-5
EC No.: 231-548-0
Molecular Weight: 104.06 g/mol
Grade: Industrial Grade
Concentration: Approximately 38%
Physical Form: Liquid
Appearance: Clear Colorless to Pale Yellow Liquid
Solubility: Completely Soluble in Water
Packaging: 250 kg HDPE Drum

Key Features

• Approximately 38% Sodium Bisulfite solution

• Industrial Grade

• CAS 7631-90-5

• Water-soluble reducing agent

• Clear to pale-yellow liquid

• Suitable for dechlorination processes

• Suitable for water and wastewater treatment

• Effective residual oxidant-reducing agent

• Suitable for pulp and paper processing

• Suitable for textile processing

• Suitable for chemical manufacturing

• Suitable for selected industrial oxygen-scavenging systems

• Standard export packaging available

• TDS, COA and SDS documentation available

Technical Specifications

Final guaranteed specifications should be confirmed against the manufacturer's current Technical Data Sheet and batch-specific Certificate of Analysis.

Applications

Water & Wastewater Treatment

Sodium Bisulphite Solution is widely used as a reducing agent in municipal and industrial water-treatment systems.

Typical applications include:

• Wastewater dechlorination

• Residual chlorine removal

• Oxidant neutralization

• Municipal wastewater treatment

• Industrial wastewater treatment

• Process-water treatment

• Selected membrane pretreatment systems

• Chemical reduction processes

Dechlorination

One of the principal industrial applications of Sodium Bisulfite is the removal of residual chlorine following chlorination.

Sodium Bisulfite reacts with residual chlorine and may be used after disinfection or oxidation processes when chlorine must be reduced before discharge or before the water enters downstream equipment.

The appropriate dosage depends on factors including:

• Free chlorine concentration

• Combined chlorine concentration

• Water flow rate

• Water chemistry

• Required residual chlorine level

• Contact time

• Treatment objective

• Process operating conditions

Dosage should be determined through appropriate process calculations, testing, monitoring and applicable treatment requirements.

Reverse Osmosis & Membrane Pretreatment

Sodium Bisulfite may be used in selected reverse-osmosis and membrane-treatment systems to reduce residual oxidizing chemicals before water reaches oxidation-sensitive membrane elements.

Potential functions include:

• Residual chlorine reduction

• Dechlorination

• Oxidant control

• Pretreatment of selected process-water streams

The required dosage and injection point depend on feed-water chemistry, membrane type, chlorine concentration, flow rate and system design.

Compatibility should always be confirmed according to the membrane manufacturer's recommendations.

Pulp & Paper Industry

Sodium Bisulfite is used in selected pulp and paper manufacturing processes as a reducing and process chemical.

Potential applications include:

• Residual chlorine removal

• Bleaching-process control

• Oxidant neutralization

• Process-water treatment

• Chemical reduction

• Pulp-processing applications

Product concentration and dosage should be selected according to the specific production process.

Textile Industry

Sodium Bisulfite may be used in textile manufacturing and finishing operations as a reducing agent and process chemical.

Typical applications include:

• Textile dyeing

• Bleaching-process control

• Residual chlorine removal

• Chemical reduction

• Process-water treatment

• Dye-processing applications

The appropriate concentration depends on the fiber, dye system, treatment process and production conditions.

Chemical Manufacturing

Sodium Bisulfite is used as a reducing reagent, processing chemical and intermediate in selected industrial chemical processes.

Applications may include:

• Chemical synthesis

• Reduction reactions

• Oxidant neutralization

• Process-water conditioning

• Intermediate production

• Selected chemical manufacturing processes

Chemical compatibility should be evaluated before use in any formulation or manufacturing process.

Oxygen Scavenging

Sodium Bisulfite can react with dissolved oxygen and may therefore be used as an oxygen-scavenging reducing agent in appropriately designed industrial systems.

Potential applications include selected:

• Process-water systems

• Industrial water circuits

• Boiler-water treatment systems

• Oil and gas water-treatment systems

Performance and dosage depend on dissolved oxygen concentration, water temperature, pH, contact time, equipment metallurgy and overall treatment-system design.

Mining & Mineral Processing

Sodium Bisulfite may be used as a reducing or conditioning reagent in selected mining and mineral-processing operations.

Potential applications include:

• Chemical conditioning

• Reduction processes

• Selected flotation systems

• Process-water treatment

• Oxidant control

Suitability depends on the ore, process chemistry and operating conditions.

Packaging

Sodium Bisulphite is supplied in moisture-resistant industrial bags suitable for storage, handling, and export transportation.

Standard Packaging:

25 kg PP Woven Bag with Inner PE Liner

Alternative packaging may be available depending on supplier capability and customer requirements, including:

• 25 kg PE-lined PP woven bags
• 25 kg kraft paper bags with inner PE liner
• 50 kg PP woven bags with inner PE liner
• 500 kg jumbo bags
• 1,000 kg jumbo bags

Packaging is designed to protect the product from moisture, contamination, and prolonged exposure to air during storage and transportation.

Keep bags tightly sealed until use. Once opened, the remaining material should be resealed immediately and stored under dry conditions.

Storage

Store Sodium Bisulphite in a cool, dry, and well-ventilated warehouse.

Recommended storage conditions include:

• Keep bags tightly sealed
• Protect from moisture and humidity
• Protect from rain and direct water exposure
• Store away from strong acids
• Store away from strong oxidizing agents
• Keep away from excessive heat
• Store on clean, dry pallets above floor level
• Avoid prolonged exposure to air
• Protect from contamination

Exposure to moisture or air may affect product quality and stability.

Always follow the current product-specific Safety Data Sheet for storage, handling, incompatibility, and emergency requirements.

Handling & Safety

Sodium Bisulfite is a reducing agent and should be handled using appropriate industrial chemical-handling procedures.

Contact with acids may release sulfur dioxide gas.

Avoid:

• Contact with strong acids

• Contact with strong oxidizing agents

• Uncontrolled heating

• Breathing mist or vapors

• Eye contact

• Prolonged skin contact

• Handling in inadequately ventilated areas

Recommended protective measures may include:

• Chemical-resistant gloves

• Chemical splash goggles

• Suitable protective clothing

• Adequate ventilation

• Respiratory protection where required

• Accessible eyewash facilities

• Emergency safety shower where appropriate

Always consult the current product-specific Safety Data Sheet (SDS) before handling, storage, transportation or industrial use.

Quality Documentation

Supporting documents may be supplied according to the applicable product and shipment requirements, including:

• Technical Data Sheet (TDS)

• Certificate of Analysis (COA)

• Safety Data Sheet (SDS)

• Commercial Invoice

• Packing List

• Certificate of Origin where applicable

• Transport documentation where applicable

A batch-specific Certificate of Analysis should contain the actual analytical results for the supplied material.

Typical COA Parameters

A Certificate of Analysis may include:

• Appearance

• Sodium Bisulfite concentration

• Available SO₂

• pH

• Specific gravity

• Iron content

• Sulphate

• Water insoluble matter

• Batch number

• Production date

• Inspection date

• Quality-control conclusion

Actual values should be based on laboratory testing of the supplied batch.

Quality Assurance

Product quality should be verified according to the manufacturer's approved production specification and batch analysis.

Final Sodium Bisulfite concentration, available SO₂, pH, specific gravity, impurity limits and other quality parameters should be confirmed through the manufacturer's Technical Data Sheet and applicable batch Certificate of Analysis.

Important Grade Information

This product is offered as Industrial Grade Sodium Bisulphite Solution.

Industrial Grade material should not automatically be represented as:

• Food Grade

• Pharmaceutical Grade

• Drinking-Water Approved

• NSF Certified

unless the actual supplied product has the applicable manufacturing standard, purity requirements and supporting certification.

Product Summary

Product: Sodium Bisulphite Solution
Chemical Name: Sodium Bisulfite
Alternative Name: Sodium Hydrogen Sulfite
Formula: NaHSO₃
CAS No.: 7631-90-5
EC No.: 231-548-0
Molecular Weight: 104.06 g/mol
Grade: Industrial Grade
Content: Approximately 38%
Appearance: Clear Colorless to Pale Yellow Liquid
Solubility: Completely Soluble in Water
Packaging: 250 kg HDPE Drum
Primary Application: Water & Wastewater Dechlorination
Additional Applications: Pulp & Paper, Textile Processing, Chemical Manufacturing, Process Water Treatment and Selected Oxygen-Scavenging Systems
Documentation: TDS / COA / SDS