|
HS Code |
695025 |
| Product Name | AR Sodium Dithionite 500g |
| Chemical Formula | Na2S2O4 |
| Molecular Weight | 174.11 g/mol |
| Purity | Analytical Reagent (AR) Grade |
| Appearance | White to pale yellow crystalline powder |
| Solubility | Soluble in water |
| Storage Conditions | Store in a cool, dry place; keep container tightly closed |
| Cas Number | 7775-14-6 |
| Hazard Classification | Harmful if swallowed; causes skin and eye irritation |
| Main Use | Reducing agent in laboratories and industries |
| Packaging Size | 500 grams |
| Melting Point | Decomposes before melting |
| Un Number | UN1384 |
| Stability | Unstable in moist air and aqueous solutions |
| Manufacturer Recommendation | Handle under dry conditions; avoid exposure to moisture |
As an accredited AR Sodium Dithionite 500g factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | The AR Sodium Dithionite 500g comes in a tightly sealed, white HDPE bottle with a blue screw cap and clear labeling. |
| Container Loading (20′ FCL) | 20′ FCL container loads AR Sodium Dithionite 500g bottles, typically stacked securely on pallets for safe, efficient international transport. |
| Shipping | **Shipping Description:** AR Sodium Dithionite 500g is shipped in a tightly sealed, moisture-proof container to prevent decomposition. The package complies with hazardous material regulations, including proper labelling and documentation. It is handled with care, avoiding exposure to heat, ignition sources, and moisture during transit to ensure safe delivery. |
| Storage | Store AR Sodium Dithionite 500g in a cool, dry, well-ventilated area away from moisture, heat, and incompatible materials such as acids and oxidizing agents. Keep the container tightly closed and protected from light. Handle with care to prevent contamination. Use non-sparking tools and avoid exposure to water or humid conditions, as the chemical decomposes rapidly when wet. |
| Shelf Life | AR Sodium Dithionite 500g typically has a shelf life of 6-12 months, stored tightly sealed in a cool, dry place. |
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Purity 98%: AR Sodium Dithionite 500g with purity 98% is used in textile dyeing processes, where it efficiently reduces vat dyes to deliver vibrant and uniform coloration. Particle Size ≤100 µm: AR Sodium Dithionite 500g with particle size ≤100 µm is used in paper pulping, where fine dispersion enables rapid delignification for enhanced pulp brightness. Stability Temperature ≤35°C: AR Sodium Dithionite 500g with stability temperature ≤35°C is used in chemical synthesis laboratories, where stable reducing conditions prevent unwanted oxidation of sensitive compounds. Moisture Content ≤1%: AR Sodium Dithionite 500g with moisture content ≤1% is used in leather processing, where low moisture content ensures consistent reductive tanning reactions. Sulfite Content ≤0.5%: AR Sodium Dithionite 500g with sulfite content ≤0.5% is used in wastewater treatment, where minimal by-products guarantee efficient reduction of chromate contaminants. |
Competitive AR Sodium Dithionite 500g prices that fit your budget—flexible terms and customized quotes for every order.
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Tel: +8615380400285
Email: sales2@liwei-chem.com
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We manufacture sodium dithionite because the market demands both reliability and real chemistry knowledge. Over decades of producing this salt, our engineers have seen it become a backbone for industries ranging from textile dyeing to water treatment. The AR (Analytical Reagent) grade we bring to market isn’t just a label; it’s the result of strict process controls, careful raw material selection, and repeated quality checks. In every 500-gram bottle, we pack our experience along with a pure, bright white crystalline powder that responds consistently batch after batch. Our AR Sodium Dithionite comes ready for analytical use, where accuracy and predictable reactivity matter more than price alone.
Producing sodium dithionite sounds straightforward, but the details make the difference. From sourcing sodium formate to managing sulfur dioxide, we have found that impurities in inputs show up later as staining, odors, or unstable solutions. We’ve modified retention times and crystal washing steps to chase down colored contaminants that can skew results in sensitive dye baths or analytical tests. These are direct lessons from the lab and the plant — not just textbook wisdom. Workers here see the difference each small change makes, whether it’s in the brightness of paper pulp or the yield of a metal reduction.
Our AR grade stands apart from technical and lower purity grades. While other grades end up in industrial reduction or crude applications, AR sodium dithionite must fit demanding roles. Chemists in research labs expect a reducing agent whose strength doesn’t drift. Textile dyers need complete solubility without leftover specks. We’ve built this product for those arenas. Simple purity isn’t the whole story. Particle size and moisture content influence everything from solution prep to shelf life. This is why we seal each bottle under controlled humidity and check odor and flow before shipping.
Every batch of AR Sodium Dithionite 500g comes from our same core process, refined by feedback from partners in the field. Chemically, sodium dithionite (Na2S2O4) works as a reducing agent. The AR label means we keep heavy metals and oxidizing residues lower than in the regular, industrial product streams. We grind each lot to a uniform powder that dissolves rapidly, since clumping slows workflow and can cause errors. A well-packed 500g jar lets lab staff scoop or weigh out portions in less time, reducing waste and surprise clumps.
We use packaging proven on the road. Lightweight, opaque containers block UV, protecting the product — since sodium dithionite reacts fast in light or air. No more faded or degraded powder, especially for users operating in warmer or more humid climates. Some competitors fill jars with lesser grade material, leading to yellow tint or stuck-together lumps; we made changes after one sticky summer shipment years ago, now keeping all containers under air conditioning right up to truck-loading. These are the kinds of behind-the-scenes choices that only show up after long industry experience.
Customers count on this product for two big reasons: trust in its reactions and convenience in lab and production settings. We focus on the needs of analytical laboratories conducting redox titrations, paper mills running tests for brightness, and textile houses testing new synthetic dye systems. Here, erratic results just cost too much time and money. For these users, inconsistent results ruin batches or force costly retesting. We provide a product that prevents those headaches.
Some customers want a reliable reducing agent for organic synthesis. Others run small purification operations treating water contaminated with stubborn dyes or metals. In these applications, reactions must occur fast and cleanly — stray impurities mean failed purification. Our process guards against metallic or sulfur contaminants. Lab users often mention that our powder dissolves ‘clean’ — no floating bits or oily globs. In contrast, cheaper substitutes from less careful plants sometimes arrive with faint sulfur odors or slight discoloration. We see fewer customer complaints and much more repeat business after tightening our own purity and packaging steps.
The market offers sodium dithionite in a confusing range of grades and pack sizes. Some firms produce only industrial-grade dithionite, targeted at textiles and leather processing, where large-scale color stripping tolerates small impurities. Technical grades, sold in larger sacks or drums, suit bleaching wood pulp or de-inking recycled fiber. Some labs also try to pay a lower price for these types, accepting risk for non-critical jobs.
AR grade must hit a much tighter mark. We track every stage of production and sample every batch, not just the final product. Metal residues, basicity, and sulfur compound traces get measured using rigorous tests. Our staff notice the difference — AR grade means no shortcuts on filtration or dryness, no packing of last week's off-spec crystallization. There’s a reason why analytical labs and specialty chemists order AR grade even at a higher up-front cost. They want insurance against sample reruns and explainable batch records. We’ve invested in new vacuum filtration units and better washed sodium formate inputs after field failures pointed back to these step corners.
The AR 500g bottle serves a market segment that values flexibility — small enough for cleaning, testing, and experimental work, large enough to handle repeated use over a project. Larger bags end up wasted in most labs as sodium dithionite gradually decomposes after opening. We see strong reorders for the 500g size because customers avoid product loss, and because shipping and storage runs easier for everyone.
Maintaining performance in every jar of AR Sodium Dithionite 500g means more than following the same recipe over and over. Our plant staff run regular moisture checks, knowing that even a few percent excess humidity sets off decomposition. Sodium dithionite loves to absorb water and oxygen from any open air. So we store the finished product in an inert gas environment right up to bottling. We once noticed that powder in the first-packed jars showed better shelf life than last-packed ones — this led to a change in bottling line sequencing. These operational tweaks are the results of lessons learned, not just SOPs borrowed from a manual.
Any deviation from standard particle size causes headaches downstream. Too coarse and the material won’t dissolve smoothly, leaving behind residue. Too fine and it packs tight, picking up moisture. We keep all production lots within a set particle size distribution, using real-time sieving and visual checks by trained staff, not just automated tools. Years of feedback taught us which range of textures work best in water-based and solvent-based application systems.
Sodium dithionite produces sulfur dioxide when it gets hot or wet. Worker safety drives our handling systems — we vent production spaces, add airflow at storage racks, and train every new hire on safe handling. Our containers ship with desiccant packs and safety seals. Testing the headspace of each batch before sealing reveals whether we’ve trapped too much offgas or moisture, which helps protect lab users from unexpected pressure buildup. End users often comment that bottles from us open cleanly, with powder free to flow, never caked or smelling off.
We keep shipment tracking active on every outgoing lot. When weather forecasts warn of damp, we adjust liner materials, doubling up barriers for longer routes. Years ago, we learned the hard way following mid-summer shipping failures that even an hour on a hot truck can trigger caking or odor, so we now use insulated loads for certain destinations. These are not minor details for users relying on accurate dissolutions and clean reaction setups.
Sodium dithionite runs through multiple industries, and its environmental impact follows. We’ve redesigned production steps to limit wastewater discharge and have adjusted reaction quenching so that residual sulfites reach neutral pH before disposal. As end-users face tighter government oversight on effluent, we brief them with the right handling data. Working alongside customer environmental teams, we help optimize peroxide post-treatments, keeping effluent quality up and costs down.
Some importers have asked us to certify that we do not use mercury catalysts or certain banned solvents anywhere in the plant — and we’re glad to put that in writing. Regulatory agencies perform spot checks and dig into records. As the original producer, we open process logs on demand, and can supply test data for each outgoing lot. Our transparency makes compliance checks less stressful for QA staff down the chain.
Not every laboratory or factory gets the same experience when buying sodium dithionite. We have tested samples from large-scale industrial suppliers and small reseller brands — not all powders labeled “AR” tell the whole story. Inconsistent granulation, slumped color, and traces of metallic taste in solution disappointed more than a few longtime market users. Our lab once picked up slight iron readings in competitive products sold as AR grade, which would’ve spoiled a colorimetric analysis without warning. This is not to paint competitors in a bad light — but to highlight that genuine AR Sodium Dithionite comes from attention to each part of the process, not just labeling.
Customers sometimes believe that dithionite is all the same until a process fails. We have collected data from partners frustrated by failed stripping of stubborn dyestuffs or inconsistent metal precipitation in lab-scale applications. Often, upgrading from a generic chemical supplier to a recognized manufacturer like ourselves solves those headaches. Not every buyer wants to pay AR price, and for routine textile work, lower grades remain popular. But in applications where reproducibility means everything, the added investment in a true AR product pays for itself many times over, reducing the hidden costs of retests and lost materials.
We don’t just put AR Sodium Dithionite 500g on a shelf and wait for orders. Our technical team supports users through application-specific advice — some of the best feedback we’ve gotten has come from textile mills deploying our AR grade for new dye blends, or from lab managers tackling complex reduction chemistries. We document how to handle rapid solution prep and minimize decompositions, and in the event of a strange result, we can trace back using batch analytics and user-specific troubleshooting. Our technical reps are all former plant operators or QC veterans, not just sales staff: they know the quirks of sodium dithionite and stay in touch with site chemists worldwide.
This “feedback-in” approach has pushed us to keep process improvements ongoing. We keep data logs on filter paper residues and monitor feedback on solubility rates during the first weeks after launch in new territories. From temperature-stable packaging materials to modified crystal washing steps, nearly every real-world complaint or suggestion results in direct changes back in production. Over the last five years, we have seen double-digit drops in field complaints as improvements stack up — and each feedback loop reinforces our emphasis on practical usability.
Some users report clumping, unusual odors, or rapid discoloration after exposure. From our experience, those problems trace back to slow, piecemeal bottling, or exposure to oxygen before final packaging. Our QC team uses both standard and side-by-side testing to compare each lot. We always store production output in nitrogen-purged rooms, and double-check headspace on every 500g bottle. If any jars show early instability, that triggers a process review and revalidation. We have swapped out certain container liner plastics after seeing slight migration of volatiles.
Lighting and temperature control also play roles. Years ago, shipments exposed to extended daylight on docks started showing a faint yellow coloration and weak reducing power. Now we insist that AR Sodium Dithionite never leaves direct shade during staging and dispatch. Customers in hot climates receive additional handling instructions and support, based on lessons learned from field failures.
Handling error remains the biggest source of problems among new users. Sodium dithionite reacts sharply with water and oxygen; opening a bottle near steam, leaving the cap off, or storing in humid labs accelerates spoilage. We spend time teaching users to prep solutions in single portions and reseal containers quickly. Well-trained operators see fewer clumping or spoilage issues, and our after-sales support includes guidance on best-practices learned in our own plant.
The market for AR-grade chemicals only grows with rising expectations in science and industry. More labs demand tighter controls, detailed batch records, and lower impurity thresholds. Our investment in automated moisture meters, in-line particle sieving, and high-sensitivity metal analysis shows direct results in customer satisfaction. We share data with academic partners testing new uses for sodium dithionite, always looking for the next challenge.
Our approach leans into transparency. All AR Sodium Dithionite 500g lots ship with traceable batch numbers and access to full test records. Partners know they can ask detailed process and quality questions, and get answers from trained chemists, not just email shuffling. This builds confidence beyond just purity certificates; customers know what happens at every stage from raw input to sealed jar.
We continue pushing product development by shortening feedback loops, integrating customer experience into plant adjustments, and refining both physical handling and application guidance based on decades of ground-level production practice. Our AR Sodium Dithionite 500g reflects both the science and craft of chemical manufacturing, delivering performance, reliability, and support for every demanding application.