High-Performance Sodium Bisulfite for Food & Industrial Applications

Sodium bisulfite (NaHSO₃) appears in form of white or yellowish-white crystals with an odor of sulfur dioxide and serves critical roles across food processing, water treatment, textile manufacturing, and chemical synthesis applications. This versatile inorganic compound provides unique reducing properties essential for food preservation operations, wastewater treatment processes, and specialized industrial applications requiring sulfur dioxide chemistry.

At Chemicals & Process Equipment Limited, we supply food-grade and industrial-grade Sodium Bisulfite (99% minimum purity) manufactured under FDA-approved Good Manufacturing Practices (GMP) standards and industrial quality specifications. Our product portfolio meets stringent quality requirements for both food processing and industrial applications across global markets.

✅ FDA Food Grade Standards – E222 Food Additive Compliance
✅ Industrial Quality Specifications – Textile & Chemical Manufacturing
✅ Analytical Grade Certification – Laboratory Research Quality
✅ Multi-Industry Applications – Versatile Chemical Platform
✅ Regulatory Documentation – Complete Quality Assurance Package

Technical Specifications & Chemical Properties

Specialized Packaging Solutions:

• 25kg PE bags with moisture-resistant liner for food applications
• 500kg Fiber drums with food-grade interior coating
• 1000kg Bulk bags for industrial-scale operations
• Nitrogen-purged packaging for sensitive applications

Food Processing & Preservation Applications

Food Preservative & Antioxidant (E222) From preserving fruits and vegetables to ensuring the stability of meat products and beverages, Sodium Bisulphite’s effectiveness shines through. It is also instrumental in the production of dried fruits and vegetables, where it helps retain vibrant colors and natural flavors. As E222 food additive, it serves as an effective preservative in wine production, dried fruits, processed meats, and beverages, preventing oxidation and maintaining product quality throughout extended storage periods.

Wine & Beverage Processing In wine production, sodium bisulfite functions as a crucial antimicrobial agent and antioxidant, preventing unwanted bacterial growth, controlling fermentation processes, and maintaining wine clarity and flavor profiles. The primary benefit of using sulfites as a food additive is their antimicrobial and antioxidant properties, which stop fungi and bacteria from growing in a variety of foods. It effectively neutralizes chlorine in water used for beverage production and prevents enzymatic browning in fruit juices.

Advanced Food Safety Applications The ability of sodium bisulfite to destroy aflatoxins B1 and B2 in naturally contaminated corn containing about 2,350 ppb of B1 and 450 ppb of B2 was investigated. Under certain conditions, complete destruction of aflatoxin B1 was achieved. This demonstrates sodium bisulfite’s advanced food safety applications beyond basic preservation.

Dried Fruits & Vegetable Processing Sodium bisulfite prevents enzymatic browning and maintains natural colors in dried fruits, dehydrated vegetables, and processed food products. It extends shelf life by inhibiting microbial growth and preserving nutritional content during processing and storage operations.

For comprehensive information on sodium bisulfite applications in food processing, refer to this detailed EFSA scientific evaluation and our food grade chemicals expertise provides specialized guidance for optimal food preservation performance.

Industrial & Chemical Processing Applications

Textile Bleaching & Processing It is a reducing agent in the cosmetic and in the bleaching applications. Industrial grade sodium bisulfite is widely used in the bleaching of cotton fabrics, and is also used as a reducing agent in the dye, paper, leather, and some other chemical synthesis. It provides controlled bleaching action while maintaining fiber integrity and enabling precise color development in textile manufacturing processes.

Paper & Pulp Manufacturing In paper production, sodium bisulfite serves as a pulping chemical, lignin removal agent, and bleaching assistant. It facilitates mechanical pulping processes, improves paper brightness, and reduces chemical oxygen demand in pulp mill effluents.

Leather Processing & Treatment Sodium bisulfite applications include leather treatment, serving as a reducing agent in chrome tanning processes, hair removal operations, and leather finishing procedures. It enhances leather softness and improves dye penetration during leather manufacturing.

Chemical Synthesis & Reducing Agent Sodium bisulfite functions as a versatile reducing agent in organic synthesis, pharmaceutical manufacturing, and specialty chemical production. It enables controlled reduction reactions, serves as a sulfur dioxide source, and facilitates aldehyde and ketone purification processes.

Water Treatment & Environmental Applications

Wastewater Dechlorination It is frequently used as a dechlorination agent in water treatment to eliminate chlorine residual after disinfection processes. NaHSO₃ can be used as a mild reducing agent for wastewater chlorination, effectively neutralizing residual chlorine in municipal and industrial wastewater treatment systems. Sodium Bisulfite is a reducing agent and is used for the dechlorination of water and wastewater, boiler water treatment, flue gas desulfurization.

Municipal & Industrial Water Treatment Municipal Water Supplies: Sodium bisulfite is used to remove chlorine from potable water, ensuring it meets safety standards for human consumption. Industrial Water: Many industries require chlorine-free water for their processes. Sodium bisulfite effectively removes chlorine from industrial water systems. It removes dissolved oxygen from boiler feedwater, prevents corrosion in steam generation systems, and serves as an oxygen scavenger in closed-loop water systems.

Advanced Water Treatment Systems has been used for various applications, including seawater desalination, municipal water treatment, wastewater reuse, ultra-pure water (UPW) production, and industrial process waters. Sodium bisulfite maintains water chemistry balance and extends equipment service life in reverse osmosis and membrane filtration systems.

For comprehensive information on sodium bisulfite applications in water treatment, refer to this detailed dechlorination guide by ScienceDirect. Our water treatment chemicals expertise provides specialized guidance for optimal dechlorination performance.

Quality Assurance & Analytical Testing

Comprehensive Quality Control Every production batch undergoes extensive testing to ensure compliance with food-grade, pharmaceutical, and industrial specifications. Our quality control laboratory employs advanced analytical techniques including titration methods, spectroscopic analysis, and chromatographic testing to verify purity and identify trace impurities.

Quality testing procedures include:

• SO₂ content determination via iodometric titration
• Heavy metals analysis using atomic absorption spectroscopy
• Moisture content testing through gravimetric analysis
• pH measurement using calibrated pH meters
• Particle size analysis via laser diffraction
• Microbiological testing for food-grade applications

Biotechnology & Research Applications

DNA Methylation Analysis Bisulfite treatment of DNA is often used to analyze the methylation status of cytosine (C) residues in DNA. Sodium bisulfite (NaHSO3), optionally used together with ammonium bisulfite, converts C into uracil (U), but does not affect 5-methylcytosine. This makes sodium bisulfite essential in epigenetic research and molecular biology applications.

Photographic Processing Sodium bisulfite applications include photograph processing, serving as a preservative in photographic developers, fixing bath stabilizers, and stop bath formulations. It prevents oxidation of photographic chemicals and maintains solution stability during processing operations.

Laboratory & Analytical Chemistry In analytical applications, sodium bisulfite serves as a reducing agent, standardization reagent, and preservation chemical for analytical samples. It enables precise analytical determinations and maintains sample integrity during extended storage periods.

Storage & Handling Specifications

Optimal Storage Requirements

• Maintain storage temperature between 10-30°C in dry conditions
• Protect from moisture, heat, and direct sunlight exposure
• Store in tightly sealed containers to prevent SO₂ loss
• Separate from strong oxidizing agents and alkaline materials
• Implement controlled atmosphere storage for long-term preservation

Professional Handling Guidelines

• Use appropriate personal protective equipment including respirators and gloves
• Provide adequate ventilation during material handling and processing
• Avoid dust generation through controlled transfer procedures
• Maintain emergency shower and eyewash facilities in work areas
• Follow food-grade handling protocols for E222 applications

Regulatory Compliance & Documentation

Food Safety Standards The EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS) was asked to deliver a scientific opinion re-evaluating sulfur dioxide (E 220), sodium sulfite (E 221), sodium bisulfite (E 222) and related sulfites. Our sodium bisulfite meets FDA regulations for food additives and FEMA GRAS (Generally Recognized as Safe) requirements. Complete documentation includes certificates of analysis, food safety data, and regulatory compliance statements for food processing applications.

Industrial Safety Compliance

• Complete Safety Data Sheets with GHS classification
• Transportation documentation per UN/DOT regulations
• Environmental impact assessment for industrial applications
• Occupational health and safety guidelines for workplace use
• Quality management system certification (ISO 9001 compliance)

Pharmaceutical & Medical Applications

Pharmaceutical Manufacturing Additionally, sodium bisulfite has antioxidant properties, helping to prevent oxidation and the degradation of certain chemicals. In food processing, it serves as a preservative and antioxidant in pharmaceutical formulations, preventing drug degradation and maintaining product stability. It functions as an excipient in injectable medications and enables controlled-release drug delivery systems.

Medical & Healthcare Applications In healthcare settings, sodium bisulfite serves as a sterilization aid, equipment cleaning agent, and laboratory reagent for medical testing procedures. It maintains sterile conditions and prevents contamination in medical device processing.

Environmental & Safety Considerations

Environmental Impact Assessment Sodium bisulfite provides environmentally favorable alternatives to chlorine-based chemicals in many applications. It decomposes naturally to sodium sulfate and sulfur dioxide, minimizing long-term environmental impact while maintaining process effectiveness.

Workplace Safety Protocols EPA, FDA, and American Conference of Governmental Industrial Hygienists established a working place threshold limit value for sulfur dioxide of 2ppm averaged over 8 hours, ensuring safe workplace exposure levels during sodium bisulfite handling and processing operations.

Why Choose Chemicals & Process Equipment Limited?

✔ Multi-Grade Excellence – Food, pharmaceutical, and industrial specifications available
✔ Quality Leadership – Advanced testing ensures consistent high purity standards
✔ Application Expertise – Technical support across diverse industry applications
✔ Regulatory Assurance – Complete documentation for food and industrial use
✔ Global Distribution – Reliable supply chain supporting international operations

Our sodium bisulfite products represent the highest standards in inorganic chemistry, specifically formulated for demanding food processing, water treatment, and industrial applications. We provide comprehensive technical support, regulatory documentation, and quality assurance to ensure optimal performance across your specialized chemical processes.

For detailed specifications, application protocols, or regulatory documentation, contact our specialized chemical team. We provide comprehensive support including method development, process optimization, and regulatory compliance assistance to maximize effectiveness in your food processing, water treatment, or industrial applications.