Description
PRODUCT INTRODUCTION
Sodium Metabisulfite 97% Industrial Grade is a high-purity inorganic reducing agent supplied as a white or slightly yellow crystalline powder. It dissolves readily in water and forms sodium bisulfite in aqueous solution.
The product is widely used in industrial water treatment, wastewater dechlorination, mining and mineral processing, pulp and paper production, textile processing, leather treatment and general chemical manufacturing.
EASTKING supplies stable industrial-grade Sodium Metabisulfite with controlled purity, iron content and water-insoluble matter. Each shipment can be supplied with a batch-specific Certificate of Analysis, Technical Data Sheet and Safety Data Sheet.
KEY PRODUCT FEATURES
| 97% Minimum Assay
Stable sodium metabisulfite content provides reliable reducing performance and supports consistent industrial processing. |
| Effective Dechlorination
Commonly used to reduce residual free chlorine in industrial water and wastewater systems. |
| Good Water Solubility
The crystalline powder dissolves readily, making it suitable for preparing metered chemical solutions and continuous dosing systems. |
| Controlled Impurities
Low iron content and low water-insoluble matter help reduce sediment, discoloration and operational instability. |
| Stable Export Supply
Available in moisture-resistant industrial packaging with neutral marking, customized printing and palletized export options. |
TYPICAL SPECIFICATION
| Test Item | Typical Standard |
| Sodium Metabisulfite, Na₂S₂O₅ | ≥97.0% |
| Sulfur Dioxide, SO₂ | ≥65.0% |
| Iron, Fe | ≤0.005% |
| Water-Insoluble Matter | ≤0.05% |
| pH, 5% Solution | 4.0–4.8 |
| Appearance | White or slightly yellow crystalline powder |
Important: The above values are typical industrial-grade specifications. The final specification and actual test results should be confirmed by the batch COA supplied with the shipment.
MAIN APPLICATIONS
- Industrial Water Treatment
- Residual chlorine removal
- Wastewater dechlorination
- Dissolved oxygen control
- Protection of downstream treatment equipment
- Reduction of oxidizing substances
The required dosage depends on the chlorine concentration, water flow, pH, mixing conditions and treatment target.
- RO and Desalination Pretreatment
- Removal of free chlorine before chlorine-sensitive RO and NF membranes
- Protection of membrane elements against oxidative damage
For membrane systems, a high-purity, impurity-controlled and cobalt-free grade should be selected. Suitability of standard industrial grade must be confirmed for the specific system.
- Wastewater Treatment
- Neutralization of residual chlorine
- Reduction of oxidizing agents
- Treatment of selected chromium-containing streams
- Detoxification of cyanide-containing wastewater under properly designed treatment conditions
Special wastewater applications must be designed and controlled by qualified technical personnel.
- Mining and Mineral Processing
- Mineral flotation and ore processing
- Gold-mining chemical systems
- Cyanide destruction processes
- Control of oxidation-reduction conditions
- Selective separation of certain minerals
The dosage and operating procedure must be determined according to the ore composition and process design.
- Pulp and Paper Industry
- Dechlorination after bleaching
- Removal of residual oxidants
- Pulp processing
- Brightness and colour control
- Protection of process equipment
- Textile and Leather Processing
- Reducing agent
- Dechlorinating agent
- Bleaching auxiliary
- Dyeing and finishing process chemical
- Leather-processing auxiliary
- Chemical Manufacturing
- Chemical synthesis
- Dye and pigment production
- Pharmaceutical intermediates
- Rubber and polymer processing
- Industrial cleaning formulations
WHY CHOOSE EASTKING
| Consistent Product Quality
Each batch can be inspected for assay, sulfur dioxide content, iron and water-insoluble matter before shipment. |
| Complete Export Documentation
COA, TDS, SDS, commercial invoice, packing list, certificate of origin, transport identification and third-party inspection documents can be supplied according to the order. |
| Flexible Industrial Packaging
Standard and customized packaging is available for importers, chemical distributors and industrial users. |
| Reliable Container Supply
Stable sourcing and container-loading arrangements support repeat orders and long-term supply programs. |
| Sample Support
Representative samples can be supplied for specification verification and customer testing before bulk orders. |
PACKAGING
Standard Packaging
- 25 kg PP woven bag with PE inner liner
- 25 kg kraft paper bag with moisture-resistant inner liner
- 500 kg or 1,000 kg jumbo bag upon request
Customized Packaging
- Neutral packaging
- Customer brand printing
- Customized shipping marks
- Palletized packing
- Shrink-wrapped export pallets
Typical container loading quantity should be confirmed according to bag type, pallet requirements, destination-country weight limits and shipping-line restrictions.
STORAGE AND HANDLING
Store in a cool, dry and well-ventilated warehouse. Keep the packaging tightly sealed and protect it from moisture, heat and direct sunlight.
Keep the product separated from:
- Acids
- Strong oxidizing agents
- Nitrites
- Nitrates
- Moisture-sensitive or incompatible materials
Contact with acids may release toxic sulfur dioxide gas. Avoid dust formation and use appropriate eye, face and respiratory protection during handling.
SAFETY INFORMATION
Standard industrial Sodium Metabisulfite is commonly classified as non-dangerous for IMDG sea transport, but it remains a chemically hazardous industrial substance and must be handled according to the current SDS.
The material may:
- Cause serious eye damage
- Be harmful if swallowed
- Irritate sensitive respiratory systems
- Release sulfur dioxide when in contact with acids
- Consume oxygen in enclosed containers or tanks
Personnel should follow the current SDS and all applicable occupational safety requirements
FREQUENTLY ASKED QUESTIONS
Is Sodium Metabisulfite 97% a dangerous good?
Standard industrial Sodium Metabisulfite is commonly classified as non-dangerous for IMDG sea transport. The final determination must be based on the actual supplier’s SDS and transportation identification report.
Is industrial-grade SMBS suitable for RO membranes?
It can be used for dechlorination, but membrane manufacturers generally recommend a high-purity, impurity-controlled and cobalt-free grade. Industrial grade should not automatically be described as suitable for every RO system.
Does the product require application testing?
Normally, no product-model selection is required. The customer mainly needs to confirm purity and impurity limits. The actual dosage must still be determined according to the treatment system and operating conditions.
Can EASTKING provide a batch COA?
Yes. Each shipment can be supplied with a batch-specific Certificate of Analysis.
Can the packaging be customized?
Yes. Neutral packaging, customized printing, shipping marks and palletized packing are available according to the order quantity.
Is this product suitable for food applications?
No. This document covers industrial-grade Sodium Metabisulfite. Food processing requires a separately manufactured and certified food-grade product meeting the applicable food-additive regulations.
REQUEST A QUOTE
Looking for a reliable Sodium Metabisulfite 97% supplier from China? Please provide the following information:
- Required grade
- Technical specification
- Final application
- Packaging
- Required quantity
- Destination port and country
EASTKING will provide the appropriate product specification, export documents and commercial quotation.
WEBSITE AND SEO COPY
| Website Element | Recommended Copy |
| Recommended Page Title | Sodium Metabisulfite 97% Industrial Grade Supplier from China |
| SEO Title | Sodium Metabisulfite 97% Supplier | Industrial Grade SMBS |
| Meta Description | EASTKING supplies Sodium Metabisulfite 97% Industrial Grade for water treatment, wastewater dechlorination, mining, pulp and paper, textile and chemical processing. Available in 25 kg export bags with COA, TDS and SDS. |
| Short Product Description | High-purity Sodium Metabisulfite 97% Industrial Grade for dechlorination, water treatment, mining and industrial reducing applications. Stable quality, complete export documentation and flexible 25 kg packaging. |
INFORMATION TO CONFIRM BEFORE WEBSITE PUBLICATION
- Final iron specification: ≤0.005% or ≤0.003%
- Final water-insoluble matter specification: ≤0.05% or ≤0.02%
- Available packaging: PP woven bag, kraft paper bag, or both
- The actual transport identification report confirms IMDG non-dangerous-goods status
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