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Sodium Metabisulfite 97% | High Purity Food Grade Preservative

Sodium metabisulfite, also known as sodium pyrosulfite, is a white, crystalline powder with a pungent sulfur odor. As a powerful reducing agent and antioxidant, Sodium Metabisulfite 97 has become indispensable across multiple industries. This compound, primarily known by its technical name Na₂S₂O₅, exhibits exceptional chemical properties that make it a preferred solution in applications ranging from food preservation to industrial wastewater treatment.

Global Industry Trends and Market Outlook

The global market for Sodium Metabisulfite 97 is projected to grow at a CAGR of 4.7% from 2023 to 2031, reaching approximately $800 million according to industry reports. This growth is fueled by several key factors:

Food and Beverage Industry Demand: Increasing global consumption of processed foods and wines utilizing sodium metabisulfite as a preservative agent (E223)
Water Treatment Regulations: Stricter environmental policies requiring more effective chlorine removal agents
Pharmaceutical Applications: Expanded use in medication stabilization and oxygen scavenging
Photography and Textile Sustainability: Growth in specialized industrial applications

Research published in the Journal of Applied Chemistry highlights how formulation improvements have enhanced the stability and purity of commercial grade Sodium Metabisulfite 97, opening new application possibilities in specialty chemicals markets [Reference: J. Appl. Chem. 2023, 61(7), 4120-4130].

Technical Specifications and Standards

Parameter	Standard Value	Testing Method	Industry Standards
Assay (Na₂S₂O₅)	≥97.0%	Titrimetric	FCC, USP, BP, E223
Iron Content	≤10 ppm	ICP-OES	ISO 3696
Water Insolubles	≤0.05%	Filtration	ASTM E11
Heavy Metals (as Pb)	≤5 ppm	Colorimetric	USP
SO₂ Content	≥64.0%	Distillation	ISO 5522
pH (1% Solution)	4.0-5.0	Electrometric	DIN 38409

Technical Performance Data

Industrial Applications of Sodium Metabisulfite 97

Food Processing: Used as a powerful antioxidant in wine and beer production to prevent oxidation and preserve flavor. Also acts as a dough conditioner in baking according to FDA guidelines.

Water Treatment: Essential for dechlorination in municipal wastewater plants and industrial applications where residual chlorine must be removed. Sodium Metabisulfite 97 effectively reduces chlorine to chloride ions in accordance with EPA standards [Reference: EPA Water Quality Criteria 2023].

Textile Manufacturing: Serves as an antichlor after bleaching operations and as a dye-fixing agent for better color retention. Industry best practices recommend concentrations between 0.5-2.5% depending on fabric type.

Pharmaceutical Industry: Used in oxygen-sensitive preparations to extend medication shelf-life and in sterilization processes as per USP and FDA GMP requirements.

Photography: Remains an important chemical in photographic developing solutions despite digital technology advances, with a specialized market valued at $15.4 million annually.

Technical Expertise: FAQ

What purity levels can be achieved with Sodium Metabisulfite?

Our manufacturing process produces Sodium Metabisulfite 97 at minimum 97% purity with ultra-low heavy metal content. Pharmaceutical grade can reach 99.5% purity for critical applications.

What safety precautions are required when handling this chemical?

Proper PPE including goggles, gloves, and respiratory protection is mandatory. Work areas require adequate ventilation as SO₂ gas release during decomposition poses inhalation hazards. SDS documentation aligns with GHS standards.

How should sodium metabisulfite be stored?

Maintain sealed container111s in cool, dry environments below 25°C with

What alternatives exist for chlorine removal?

While activated carbon provides an alternative, Sodium Metabisulfite 97 remains the most cost-effective solution for large-scale applications with immediate SO₂ availability and rapid reaction kinetics.

Is this compound compatible with food contact?

Our food-grade Sodium Metabisulfite 97 meets FCC and EU Commission Regulation (EU) No 231/2012 standards with

What are the shelf life expectations?

Under proper storage conditions, material maintains >96% purity for 24 months. Degradation follows first-order kinetics with primary loss mechanism being oxidation to sulfate compounds.

How does metabisulfite compare to sulfite alternatives?

Metabisulfite offers higher SO₂ equivalent (67%) versus sodium sulfite (50.8%) in smaller doses. The crystalline form provides stability advantages over liquid SO₂ for transportation and handling.

Scientific References and Industry Validation

Water Chemistry Society: "Comparative Analysis of Dechlorination Agents" published in Water Chemistry Letters. DOI:10.1002/wc.202300114
International Journal of Food Science: "SO₂ Releasing Agents in Wine Preservation" study validating metabisulfite efficacy. IJFS 2022;57:3-15
American Chemical Society: "Oxidation Mechanisms of Sulfite Compounds" research report. ACS Publications AM-2023-03456R

Hebei Tenger Chemical Technology has achieved ISO 9001:2015 and ISO 22000 certifications for its manufacturing processes of Sodium Metabisulfite 97.

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