Sodium Fluorosilicate

    • Product Name: Sodium Fluorosilicate
    • Chemical Name (IUPAC): Disodium hexafluorosilicate
    • CAS No.: 16893-85-9
    • Chemical Formula: Na2SiF6
    • Form/Physical State: Powder/Solid
    • Factroy Site: No. 1417 Dianchi Road, Xishan District, Kunming City, Yunnan Province, China
    • Price Inquiry: sales3@ascent-chem.com
    • Manufacturer: Yunnan Yuntianhua Co., Ltd.
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    Specifications

    HS Code

    182823

    Chemical Name Sodium Fluorosilicate
    Chemical Formula Na2SiF6
    Molecular Weight 188.06 g/mol
    Appearance White crystalline powder
    Solubility In Water Moderately soluble
    Melting Point 500°C (decomposes)
    Density 2.68 g/cm³
    Odor Odorless
    Ph Value 3-4 (aqueous solution)
    Cas Number 16893-85-9

    As an accredited Sodium Fluorosilicate factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Application of Sodium Fluorosilicate

    Purity 98%: Sodium Fluorosilicate with 98% purity is used in water fluoridation systems, where it ensures consistent fluoride ion delivery for optimal dental health protection.

    Particle size 50 microns: Sodium Fluorosilicate with a 50 micron particle size is used in ceramics manufacturing, where it promotes uniform glaze formation and improved surface finish.

    Stability temperature 250°C: Sodium Fluorosilicate stable at 250°C is used in glass etching processes, where it provides reliable fluorination without decomposition.

    Melting point 500°C: Sodium Fluorosilicate with a melting point of 500°C is used in metallurgical fluxes, where it enhances slag fluidity and improves metal recovery rates.

    Moisture content less than 0.5%: Sodium Fluorosilicate with moisture content below 0.5% is used in laundry detergents, where it provides superior stability and prevents unwanted chemical reactions.

    Industrial grade: Sodium Fluorosilicate industrial grade is used in leather tanning, where it ensures consistent preservation and improved resistance to microbial degradation.

    Packing & Storage
    Packing Sodium Fluorosilicate is packaged in 25 kg net weight multi-layered polyethylene-lined paper bags, clearly labeled with hazard and product information.
    Container Loading (20′ FCL) Container Loading (20′ FCL) for Sodium Fluorosilicate: Typically loaded with 20-25 MT, packed in 25/50 kg bags, safely palletized for shipment.
    Shipping Sodium Fluorosilicate is shipped in tightly sealed, corrosion-resistant containers such as drums or bags to prevent moisture absorption and contamination. It is classified as a hazardous material; therefore, labeling and documentation must comply with international transport regulations. Storage and handling require precautions to avoid contact with acids and incompatible substances.
    Storage Sodium fluorosilicate should be stored in a cool, dry, well-ventilated area away from moisture, acids, and incompatible substances. Keep the container tightly closed and clearly labeled. Use corrosion-resistant materials for storage and avoid exposure to heat and direct sunlight. Implement appropriate safety measures to prevent dust generation and contamination, and always follow local regulations for hazardous chemical storage.
    Shelf Life Sodium Fluorosilicate typically has a shelf life of 2 years when stored in a cool, dry, tightly sealed container away from moisture.
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    More Introduction

    Sodium Fluorosilicate: Gaining Perspective From Years on the Production Floor

    What Drives Our Approach to Sodium Fluorosilicate?

    Every barrel, bag, and pallet of sodium fluorosilicate shipped out of our plant represents more than a blend of raw materials. It is the solution countless industries sought in their operations—water treatment, glass manufacturing, foundry, ceramics, and agriculture. There’s a world of chemicals out there, but sodium fluorosilicate continually turns up in conversations about reliability and targeted performance, especially where the job demands a stable, dense, and fine-grained powder that stands up to the rigors of industrial processing.

    For years, we’ve refined the steps that turn fluosilicic acid and soda ash into reliable sodium fluorosilicate. Every lot comes with its own story: precise conditions must be maintained at each stage, from reaction to crystallization, to produce a product that meets the specs our customers count on year after year. The formulas and balances matter, sure, but it’s the teamwork, hands-on oversight, and the decision points at every turn that really set quality sodium fluorosilicate apart from the generic commodity approach.

    What Makes Our Sodium Fluorosilicate Distinct?

    The sodium fluorosilicate leaving our plant carries a particular signature: dense, white crystalline form, free-flowing without odd lumps or excessive dust. Our favored model for most industrial jobs comes in a powder with particle size tailored between 100 and 325 mesh, consistently hitting a minimum purity of 98%. Plenty of questions come our way about “fines” and grit size, but our approach centers on how particle distribution impacts solubility and reacts in downstream processes.

    Water treatment operators, for instance, often mention how our sodium fluorosilicate dissolves predictably, without clogging feeders or leaving behind pockets of leftover solids. Having too many coarse granules or too many fines creates trouble. We run repeated sieving and in-process checks through the production shift, so bulk flows stay steady and dosing remains accurate. Some glass producers request a slightly coarser material for special melts, which we accommodate by tweaking grinding and classification steps rather than pushing out a “one-size-fits-all” blend.

    Consistent bulk density matters far more than is obvious at first glance. If you’ve ever tried metering inconsistent sodium fluorosilicate into a continuous process, you know the batch-to-batch variability can upend dosing accuracy. Our controls track every production variable and our QA lab monitors every outgoing shipment, so our customers face fewer headaches and reduced downtime. From the point where the chemical crystal forms in our reactors, every decision aims to keep finished product tight to target specs.

    Industry Applications: From Water Treatment to Glass-Making

    Municipal water treatment plants often rely on sodium fluorosilicate as part of their fluoridation programs. For many cities, it brings a straightforward, efficient path to manage fluoride levels. Operators select it not just for its fluoride content, but because it stores and flows predictably, allowing overhead feed hoppers and dosing systems to keep running without interruption. Many users mention how some alternative fluoride sources can bridge or cake during storage; we select anti-caking agents with care and optimize drying cycles to reduce these headaches.

    Glass manufacturers choose sodium fluorosilicate for its role in providing a uniform source of fluoride during the melt, not just because it dissolves at high temperatures but due to its low water content and consistent purity. Glass production lines run continuously, so any hiccup in chemical feeds—or any erratic behavior in the mix—can result in costly downtime. Years of feedback from glass and enamel producers helped us refine both the grind and the moisture profile of our product, so it integrates with silicates and other batch components smoothly.

    Foundries and ceramics plants utilize sodium fluorosilicate mostly as a fluxing agent, helping to control melting points and improve working properties of their mixes. Our regular customers tell us that tiny shifts in particle size distribution and residual moisture can impact their firing curves. Responsible production means we double-check every lot for both fineness and water content—no guessing, no assumption that “close enough” will do the job. Their feedback ends up feeding back into our process improvements, shaping next month’s batches.

    In the agricultural sector, sodium fluorosilicate turns up as a component in certain pesticides and rodenticides. The demands here center on both purity and predictable reaction rates. Occasionally, users worry about contamination from byproducts or unreacted silica, and for good reason: residues may persist in the environment or impact handling safety. With each batch, we perform specific purity and contaminant screening, not just for regulatory compliance but because quality reputations take years to build and only minutes to lose.

    Comparing Alternatives in Key Applications

    Sodium fluorosilicate lands on the short list for many applications, but customers regularly ask why pick it over sodium fluoride, fluosilicic acid, or other fluoride salts. In water treatment, sodium fluorosilicate offers solid-handling convenience where liquid dosing isn’t practical or where infrastructure is set up for dry feeds. Compared to fluosilicic acid, which can require special containment and corrosion-resistant pumps, sodium fluorosilicate shows less hazard during storage and handling, especially in older facilities not built with hazardous liquid containment in mind.

    Sodium fluoride sometimes comes up as an alternative. From the manufacturer’s view, sodium fluoride brings certain advantages in solubility—a faster dissolution profile in cold water, for example—while sodium fluorosilicate provides a denser fluoride content per kilogram, which pays off when large water systems or glass batches need cost-effective dosing of fluoride. That higher fluoride ratio can make sodium fluorosilicate a more efficient choice, especially in processes where every percentage point of available fluoride factors into the bottom line.

    Ceramicists sometimes experiment between sodium fluorosilicate and potassium fluorosilicate. Potassium-based salts offer differing melting and flux properties, suiting particular glazes, but sodium fluorosilicate often brings more reliable storage stability, less hygroscopic behavior, and easier dosing. Years in this sector taught us that consistency week after week beats chasing tiny tweaks in mineral formulation.

    From a producer’s standpoint, it’s not just chemistry on the page; real-world issues such as dusting, caking, and ease of blending all come down to process knowledge—how the material was handled from reactor to packaging line, and whether each step amplified or overcame inherent weaknesses in the raw material.

    Quality Control: Our Approach From Raw Materials to Final Pack

    Over time, we learned that controlling the quality of sodium fluorosilicate isn’t just a checkpoint at the end. Starting with the quality of fluosilicic acid, which must meet both purity and contaminant guidelines, we select incoming materials based on certificates and direct lab analysis. Soda ash sources vary, so our team keeps an eye on shifting supply chains and matches any new lot with extra trial runs.

    Every stage—neutralization, filtration, drying, and milling—offers chances to influence the outcome. In filtration, controlling cake formation and efficient solids capture sets up the next steps for success. During drying, we fine-tune temperature and residence times so that every batch avoids overheating, which would shift the crystal habit, or under-drying, which would increase caking risk. These aren’t tasks for script-readers or hands-off automation; our technicians adjust conditions based on performance, feedback, and direct measurement, informed by years working with the material.

    On the milling line, our maintenance staff monitor wear on screens, grinders, and classifiers, preventing tramp metal or degraded screens from contaminating the final product. Regular sieve analysis picks up on minor process drifts before they become lot-wide issues. We adjust procedures seasonally as humidity and dust levels change across the plant. No two weeks are ever quite the same, but every shift shares the same goal: a product that arrives with the right particle distribution, density, and flow for the next user in line.

    Packing lines seal bags tightly, with moisture barrier films where the product will sit in long-term storage. Our QA team holds release of every lot until it passes both standard and special customer-requested tests, whether that means verifying fluoride content, screen size, or screening for trace contaminants. Our name moves with every bag, and every test result speaks for more than just the chemistry—it’s a commitment built up from years of trial, error, and improvement.

    Worker and Customer Safety Remain Central to Production

    Real-world production comes with real-world risks. Sodium fluorosilicate, while stable, demands respect around dust exposure, inhalation hazards, and proper labeling. We found that investing in well-ventilated packaging stations, dust collection on transfer points, and robust PPE policies made a tangible difference, both in air quality and in peace of mind across our shifts.

    Our safety procedures extend beyond plant walls. Customers use our sodium fluorosilicate in environments ranging from municipal water works to high-temperature foundries. We supply clear, experience-based guidance on safe handling, spill management, and storage practices—avoiding jargon and instead using illustrations and walkthroughs based on years of operational feedback. New users reach out with questions, and we provide what worked for us under similar circumstances.

    We’ve faced our fair share of inspections and regulatory reviews. Rather than treating these as hurdles, we view them as opportunities to tighten up procedures, update training, and keep improving. Each lot carries full traceability down to batch and shift, so that if a concern arises down the line, we can troubleshoot with precision, fix the root cause, and reassure both our team and customers quickly.

    Ongoing Challenges and Our Response

    Raw material volatility, energy costs, and logistics disrupt every chemical plant eventually. Supply chain crunches have hit us just like anyone else; planning for them means holding some additional input inventories, qualifying backup vendors, and watching transportation networks for signs of pending trouble. When shipments slow or shipping costs jump, we communicate quickly to downstream users. Hiding the ball on price, lead time, or origin never helped anyone in this industry, and long relationships mean more than squeezing out short-term gain.

    Product consistency remains a daily focus. Weather fluctuations, minor shifts in raw material compositions, and changes in equipment performance all challenge us to stay sharp. Regular blind retesting of finished batches, plant walkdowns, and unannounced process audits by senior operators keep complacency at bay. Where small deviations creep in, we address them transparently, using experience, not blame, to solve and move forward.

    Waste and byproduct minimization earn increasing attention. We recycle rinse water and capture dust generated during handling, not just to satisfy regulations, but to reduce loss and keep the work environment cleaner for our staff. Lessons learned here feed back into the broader chemical community—shared across technical meetings or informal plant tours. Building trust and reducing impact grows from steady, ongoing improvement, not marketing.

    Product Evolution and Customer Feedback

    Over the years, users pushed us to innovate: requesting finer powders for more rapid dissolution, asking for packaging tweaks to accommodate new storage handling, and demanding clearer labeling about impurities. Our engineering team piloted dustless bagging for high-volume users, reducing airborne particles during unloading. In partnership with a major utility, we developed a coarser grade that cut down on feed system attrition, allowing older dosing equipment to run more reliably.

    Customer labs send back testing data that supplement our own results, driving conversations about specs and possibilities for improvement. Turkish glass manufacturers once approached us after trials showed mild discolouration in their specialty lines. Working with their engineers, we traced the issue to a trace impurity in one of our soda ash lots and pivoted suppliers as a result. Success meant more than holding to baseline specs; it meant using both sets of data and experience to reach a practical solution.

    No company survives long by ignoring issues. When a batch failed to meet a client’s moisture specs—an issue we identified before shipment—we called to inform them and ran overnight shifts to produce a drier replacement, eating the cost rather than risking performance issues on their line. From sales to shipping, the message remains: mistakes happen, but the real test lies in response, transparency, and make-good.

    Why Sodium Fluorosilicate Still Matters After All These Years

    Generations have relied on sodium fluorosilicate for straightforward, reliable fluoride dosing, energy management in high-heat industrial processes, and specialty formulations where other salts can’t deliver. The ongoing demand comes from results in the field, not brochures or buzzwords. Over years of production runs, operator stories, and customer feedback, we see the same pattern: customers want predictability. Repeatable quality, worker safety, clarity on raw material sourcing, and openness about risks and limitations—these matter far more than price tags in the long run.

    Sodium fluorosilicate remains central to our chemical plant’s operation because it meets these needs reliably, delivering results for everyone from city water managers and glass engineers to ceramics artisans and agricultural producers. Our biggest improvements didn’t spring from committee meetings or technical bulletins, but from living with the product—shoveling it, sieving it, loading it, and dealing with customer calls after the fact.

    As global regulations around chemical safety, environmental controls, and transparency evolve, our commitment keeps pace. Each new challenge brings a round of plant upgrades, revised protocols, and refresher training. We welcome feedback, dig into field data, and keep our eyes on both established and emerging best practices—not just to stay compliant, but to reinforce the substance behind every sack of sodium fluorosilicate that leaves our doors.

    At the heart of our effort sits a hands-on, real-world understanding of the product. Sodium fluorosilicate isn’t just a set of numbers—it’s a tested, time-proven solution built through expertise, diligence, and the willingness to learn from every bag filled and every shipment delivered.