Qingdao Tianya Chemical Co., Ltd is a leading sodium metabisulfite manufacturer and supplier in China with over 20 years of expertise. Our 12 production lines ensure a full range of high-quality grades, serving diverse global industries from food preservation to water treatment. Trusted by partners in over 100 countries, we are committed to innovation and excellence in every batch.
What is Sodium Metabisulfite?
Sodium metabisulfite is a kind of inorganic compound with chemical formula Na2S2O5. It is also spelled as sodium metabisulphite (abbreviated as SMBS), and is also named as sodium pyrosulfite. Sodium metabisulfite is a kind of white crystalline powder and can dissolve into water. In the industries, it is often used as preservative agent, antioxidant and Dechlorinate agent.
Chemical Properties
| CAS No | 7681-57-4 |
| EINECS No | 231-673-0 |
| Molecular Formula | Na2S2O5 |
| Molecular Weight | 190.107 |
| Melting Point | 150℃ (Decomposed) |
| Density | 1.48 g/cm³ |
| Accurate Mass | 189.898254 |
| Water Solubility | 540g/L (20 ℃) |
Applications Of Sodium Metabisulfite
• Sodium metabisulfite is widely used in food and drink industry, it is used as preservative, bleaching agent, antioxidant, antimicrobial agent, leavening agent and starter.
• Used in water treatment of drinking water, municipal sewage and industry wastewater as dechlorination agent, like paper and pulp, power, leather and textile plants wastewater treatment.
• In pharmaceutical industry sodium metabisulfite is used as excipient and preservative for oral, topical and parenteral drugs, such as paracetamol. It also can be added into medications containing adrenaline to prevent the oxidation of adrenaline.
• Used as fixer and stabilizing agent in photographic industry.
• Used as concrete water reducing agent in construction industry.
• Used as dechlorinating agent and cotton scouring agent In printing and dyeing industry.
• In mining industry sodium metabisulfite is used for cyanide destruction and leaching, such as Gold, Cobalt, Iodine, Manganese, Nickel and Silver.
• Anticorrosion and bleaching treatment in wooden products.
• Coagulator in rubber industry.
• Bleaching agent for textile fibers, paper pulps.
• In feed industry sodium metabisulfite is used to preserve silage
• In chemical process sodium metabisulfite is used as sulfonating agent and reducing agent, it has significant applications in surfactants and polymerization.
• Disinfectant in cosmetic industry.
• In production of cellulose esters sodium metabisulfite is used as antiseptic.
• Sodium metabisulfite is the main raw material in production of sodium hydrosulfite, aromatic alcohols and aldehydes.
• Used in production of cleaning agents, detergents, and soaps.
• Used as antibacterial and antioxidant in wine industry.
• Used as rust remover in combination with sodium bisulfite.
• Sodium metabisulfite is used as acid washing agent to treat high-pressure reverse osmosis and nanofiltration desalination membranes, extending storage life between two uses.
Specifications Of Sodium Metabisulfite
| Items | Specification |
| Purity (As Na2S2O5 ) | 97% Min |
| Sulfur Dioxide (SO2) | 65% Min |
| Heavy Metal (Pb) | 0.0005% Max |
| Arsenic (As) | 0.0001% Max |
| Selenium (Se) | 0.0005% Max |
| Iron (Fe) | 0.002% Max |
| Water Insoluble | 0.02% Max |
| PH Value | 4.0-4.8 |
Packaging, Storage & Handling
Packaging: 25Kg plastic woven bag with PE inner/Jumbo bag.
Storage: Store at a cool, dry and ventilated storehouse.
Handling Instructions: The product is with hygroscopicity, packaging should be sealed to prevent air oxidation.
Prohibited to store and transport together with acids, oxidants, and harmful and toxic substances.
Why Choose Tianya Chemical as Your Sodium Metabisulfite Supplier?
Selecting a reliable partner for your chemical sourcing is critical. Here’s why global enterprises trust Tianya Chemical for their sodium metabisulfite needs:
20+ Years of Technical Expertise
With over two decades of dedicated focus on sodium metabisulfite, we possess unparalleled knowledge in production and application, offering you not just a product, but expert technical support.
Massive Production Capacity & Scale
Our 300,000 MT annual capacity across 12 specialized production lines guarantees we can meet your demands, from small batches to large-volume orders, without compromise.
Uncompromising Quality & Compliance
We ensure the highest standards of purity and consistency. Our products are backed by international certifications including ISO, Halal, and Kosher, meeting stringent global regulatory requirements.
Proven Global Supply Network
As a seasoned exporter to over 100 countries, we have mastered the logistics of delivering our products safely and on time, anywhere in the world. Our experience is your guarantee of a smooth supply chain.
Strategic Sourcing Advantage
Our location in China’s major industrial base provides direct access to raw materials, ensuring cost-effectiveness and a stable, reliable supply you can count on throughout the year.
Partner with confidence. Contact us today to discuss your specific requirements and experience the Tianya Chemical difference.
