HS Code | 773968 |
| Chemicalname | Sodium Metabisulphite |
| Chemicalformula | Na2S2O5 |
| Molarmass | 190.1 g/mol |
| Appearance | White or yellowish crystalline powder |
| Odor | Pungent,sulfurous |
| Solubilityinwater | Soluble |
| Meltingpoint | 150°C (decomposes) |
| Density | 1.48 g/cm³ |
| Casnumber | 7681-57-4 |
| Ph | 4.0-5.0 (5% solution) |
As an accredited Sodium Metabisulphite factory,we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Sodium Metabisulphite is packaged in a 25 kg white HDPE bag with clear labeling,hazard symbols,and safety handling instructions. |
| Container Loading (20′ FCL) | Sodium Metabisulphite is typically loaded in 25kg bags,palletized or non-palletized,with approximately 24–27 metric tons per 20′ FCL. |
| Shipping | Sodium Metabisulphite is shipped in tightly sealed,corrosion-resistant containers such as HDPE bags or drums,often with inner polyethylene liners to prevent moisture absorption. Containers are clearly labeled,and the product is transported in compliance with local regulations,away from acids,foodstuffs,and oxidizing agents to ensure safety during transit. |
| Storage | Sodium Metabisulphite should be stored in a cool,dry,well-ventilated area away from moisture and incompatible substances such as acids and oxidizing agents. Keep the container tightly closed and properly labeled. Store away from direct sunlight and sources of heat. Avoid contact with water,as it releases toxic sulfur dioxide gas. Ensure access to suitable ventilation in storage areas. |
| Shelf Life | Sodium Metabisulphite typically has a shelf life of 2 to 3 years if stored in a cool,dry,and sealed container. |
Purity 98%:Sodium Metabisulphite with a purity of 98% is used in the food processing industry,where it ensures effective preservation by inhibiting microbial growth. Particle Size 150 microns:Sodium Metabisulphite with a particle size of 150 microns is utilized in water treatment applications,where it enables rapid dissolution and efficient chlorine neutralization. Stability Temperature 65°C:Sodium Metabisulphite stable at 65°C is applied in textile bleaching processes,where it maintains consistent performance and minimizes degradation under heat. Molecular Weight 190.1 g/mol:Sodium Metabisulphite with a molecular weight of 190.1 g/mol is implemented in pharmaceutical manufacturing,where it provides reliable antioxidative protection for active ingredients. Moisture Content 0.5% max:Sodium Metabisulphite with a moisture content of 0.5% max is employed in beverage production,where it reduces the risk of caking and enhances shelf life. Granular Form:Sodium Metabisulphite in granular form is used in pulp and paper bleaching,where it offers easy handling and uniform distribution for optimized chemical reaction. SO2 Content 65%:Sodium Metabisulphite with SO2 content of 65% is applied in winery operations,where it achieves effective antiseptic action and prevents oxidation of the product. Solubility 30g/100mL at 20°C:Sodium Metabisulphite with solubility of 30g/100mL at 20°C is used in laboratory reagent preparations,where it enables rapid solution preparation for analytical accuracy. |
Competitive Sodium Metabisulphite prices that fit your budget—flexible terms and customized quotes for every order.
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We spend every day working with large volumes of Sodium Metabisulphite,from raw input through full-scale production. With years of hands-on manufacturing under our roof,we understand the crucial role this compound plays for customers in food and beverage,water treatment,and industrial sectors. Demands for purity,consistency,and safe handling are not items we take lightly—these expectations shape every aspect of our operation.
Our model of Sodium Metabisulphite typically reaches the market as a white or faintly yellow crystalline powder. Production cycles complete under strictly controlled humidity and air quality conditions. As a result,actual parameters like SO2content (often above 65%),iron content,and heavy metal traces regularly surpass expected thresholds for food-grade and industrial applications. Our chemists target a fine granule size profile that flows easily with limited caking during storage and use,and every batch’s composition undergoes full-spectrum analytics before we give it clearance. Each day,we see the difference tight process control makes,especially with a product like Sodium Metabisulphite,where minor contamination leads to failures in sensitive end uses—from beverage bottling lines to textile rinse tanks.
Historically,commercial bakers,dried fruit processors,and brewers come to us asking about usability in food systems. They care about two things above all:purity and predictability. In fruit and vegetable preservation,for instance,our manufacturing approach ensures minimal off-odors and no detectable foreign tastes,because customers need assurance their end product carries only what it should. In brewing or wine production,our low-iron Sodium Metabisulphite limits haze and interaction with color,a factor we monitor closely with each run. Staying in constant conversation with our users means formulas keep evolving based on real feedback,whether it is bakery shelf stability or color retention in packaged dried apricots.
Treating municipal water supplies,boiler water,or effluent streams calls for a reliable reducing agent. Our Sodium Metabisulphite consistently neutralizes chlorine and removes excess oxygen when handled at the prescribed dosage. We recognize end-users cannot afford unpredictable product quality—unwanted impurities cause scale,corrosion,or non-compliance with environmental demands. Our factory team inspects for residual heavy metals and insoluble matter with every bulk lot,because past incidents taught us how quickly downstream problems pile up if upstream controls lapse. We listen to plant operators on chemical handling needs,so we package and size batches to deliver as little dust and as much safety as possible during dosing.
Over time,our facility explored several grades and options. Users frequently ask about distinctions between technical-grade and food-grade Sodium Metabisulphite or how ours compares with off-the-shelf alternatives. From manufacturing experience,we have learned that the biggest changes show up in trace contaminants and batch repeatability,not just on the main assay certificate. For food and photographic applications,our lines dedicate separate equipment and air handling—raw input handling and final granulation get close scrutiny,so cross-contamination risks shrink to near zero. Iron,arsenic,and lead levels come in well below prevailing global standards.
We field frequent questions on substitutability with other sulphites,such as Sodium Sulphite or Potassium Metabisulphite. Sodium Metabisulphite releases sulphur dioxide under mild acid or heat much faster than straight sulphite,which cuts down on waiting times in many processes. Rates and completeness of reaction differ as well;for tasks like dechlorination or preservation,only a precisely manufactured sodium metabisulphite gives the right kinetics every time. We watch these details on the production line,and our own quality records offer proof of the difference.
Supply chain disruptions and fluctuating pricing in recent years left end-users searching for guarantees—especially in sectors where raw material traceability is non-negotiable. As a direct manufacturer,we support full supply chain transparency. Customers should know where every input originated,how the batch was processed,and what inspection points were in place before delivery. We document every stage,respecting what we have learned from food-grade and export buyers across many regions about the value of clarity. In our experience,transparency reduces both risk and wasted time—users who inspect our documentation gain peace of mind and fewer phone calls chasing clarification.
Occasionally,customers approach us after experiencing clogged pipes,uneven dispersion in liquid batching,or caking in storage silos. We see the effect that different specifications have in day-to-day operations:smaller,consistently formed granules reduce dust and dosing variability,while dryer powder stores far better in humid environments. Our process engineers track the root causes of these issues upstream at our mill,often tweaking drying temperatures,fluid-bed agglomeration time,or storage protocols based on reported problems. We act on feedback—if a batch starts to cause clumping or dust,we trace,troubleshoot,and document the change. Our willingness to tweak production,not just sell what is easiest to manufacture,sets us apart from off-the-shelf brands. Over time,this has saved our users downtime,reduced waste,and increased trust.
Sodium Metabisulphite carries recognized handling and safety requirements. We integrate what operators in food packing houses and plant maintenance rooms share about best practices:clear labeling;robust packaging to prevent moisture ingress;and detailed,plain-language instructions. Every batch comes with tamper-evident packaging,batch-ion coding,and datasheets aligned with both local and export market standards. While the chemistry stays the same,the real world of day-to-day use brings up practical challenges—from dust on loading docks to spills and regulatory checks—that we account for every shift.
Customers often face decisions between sodium-based and potassium-based metabisulphite,as well as simpler sodium sulphite products. In our trials and from user feedback,Sodium Metabisulphite proves most effective for rapid SO2release in acidic environments and food preservation. Sodium-based versions cost less per kilo,offer greater solubility,and blend readily into both continuous industrial and small-scale mixing setups. Potassium Metabisulphite sometimes enters the picture in specialty wine and beverage cases where sodium content needs reduction,but its higher cost and lower availability make it less suited for large-volume uses. From years in the business,we find sodium metabisulphite ticks the right boxes for routine treatment,disinfection,and food preservation jobs.
Chemically,sodium metabisulphite decomposes at lower temperatures,making it a faster acting reducing agent for water treatment and inactivation of unwanted microbes or enzymes. In photographic processing bathes,this speed and predictable SO2yield matter—sharp endpoints mean sharper final products,for example in black-and-white developing lines. Bulk shipment buyers who have experimented with alternatives often report variable results;our process consistency reduces batch-to-batch performance swings that third-party or blended powders fail to keep in check.
As producers,we see each day what works and what falters. Quality control at its core is about finding weak spots before product leaves the gate. Our R&D team continually runs improvements—raising SO2content,minimizing dusting,cutting down water of crystallization,and finding faster,cleaner drying methods. We act on data:if a shipment experiences clumping at a customer warehouse,we trace environmental history and adjust future batches. Our on-site labs run round-the-clock analyses,not only for regulatory audit but to create a consistent real-world experience. Investments in updated milling tech and closed transfer systems in recent years paid off,reducing waste at both our site and for downstream customers.
Part of our success comes from listening. Food manufacturers come with different needs from paper mills,wineries,or water utilities,and our plant teams never stop learning from unusual requests. In food dehydration,a lower odor profile won converts who previously shied away from sulphite preservers. A water treatment plant gained savings after we delivered a less-dusting grade,cutting maintenance downtime by measurable hours per month. Textile processors benefit from clearer rinse results,thanks to impurity restrictions in our supply chain agreements. Our ongoing relationships turn these small wins into industry standards. We are not detached from application:we problem-solve,run trials,and document exceptions so future batches answer user demand better than last year's run.
We believe the modern chemical business must own responsibility for every stage, from sourcing raw sodium carbonate and sulphur inputs—avoiding trace contamination, managing effluent, and keeping waste streams safe. Our environmental controls borrow best practices from partners in Europe and Asia, shrinking sulphite discharge and reprocessing off-spec batches instead of dumping. Strict oversight during reaction and drying stages limits air emissions; staff training makes sure all spills and exposures meet the highest safety norms. As a production site, we follow regular third-party audits—feedback from these not only earns customer trust but drives internal process tweaks that benefit everyone in the supply chain. We spend real resources on energy efficiency, better packaging, and sustainable logistics, accepting that direct manufacturing comes with a duty to community and business partners alike.
Customers ask about transparency, flexibility, and stability in supply. We answer these concerns not with marketing but by opening our process—site visits, open specification sheets, and real-time access to production data. Buyers see the manufacturing floor, meet the skilled workers running the lines, and review our tracking from input to output. We prove performance—not just on paper but in long-term, multiyear purchase agreements. Our willingness to adjust or customize, whether tighter specification tolerances or batch sizes, is rooted in deep practical knowledge and respect for customer operations. Repeat buyers look for more than price—they want partnership, reliability, and a relationship founded on honest answers. Manufacturing direct gives us the freedom and responsibility to deliver both.
Every particle of Sodium Metabisulphite we ship reflects dozens of daily choices—raw material selection, reaction oversight, operator skill, finished product storage, and detailed tracking. Years of manufacturing build a library of lessons: real challenges faced by the food safety inspector, plant chemist, or environmental auditor. These experiences drive the improvements in purity, convenience, and application flexibility that mark our difference from loose-packed or impure offerings. Sodium Metabisulphite is not interchangeable at random—care in manufacturing shows up on every production line, warehouse shelf, and finished consumer good.
The next time your team looks for a new supply, remember that direct manufacture brings control, knowledge, and genuine problem-solving to the table. Our plant runs on experience—experience that stands behind every box and every tonne, with each improvement guided by open conversation with users down the line.