Products

Sodium Fluorosilicate

    • Product Name: Sodium Fluorosilicate
    • Alias: Sodium fluosilicate
    • Einecs: 232-045-1
    • Mininmum Order: 1 g
    • Factroy Site: Yudu County, Ganzhou, Jiangxi, China
    • Price Inquiry: admin@ascent-chem.com
    • Manufacturer: Ascent Petrochem Holdings Co., Limited
    • CONTACT NOW
    Specifications

    HS Code

    169821

    Chemical Name Sodium Fluorosilicate
    Chemical Formula Na2SiF6
    Cas Number 16893-85-9
    Molar Mass 188.06 g/mol
    Appearance White crystalline powder
    Solubility In Water Soluble
    Density 2.68 g/cm3
    Melting Point 500°C (decomposes)
    Odor Odorless
    Ph Of 1percent Solution 4.0 - 5.0
    Stability Stable under normal conditions

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

    Packing & Storage
    Packing Sodium Fluorosilicate is typically packaged in 25 kg woven polypropylene bags with inner plastic liners, featuring hazardous material labeling.
    Shipping Sodium Fluorosilicate should be shipped in tightly sealed, corrosion-resistant containers, clearly labeled with appropriate hazard warnings. Store and transport in a cool, dry, well-ventilated area, away from acids and food items. Handle with care, following all applicable regulations for hazardous materials to prevent leaks and environmental contamination.
    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 properly labeled. Avoid contact with metals and strong acids to prevent hazardous reactions. Store in corrosion-resistant containers. Access should be restricted to trained personnel, and appropriate safety measures must be in place to manage accidental spills or exposure.
    Application of Sodium Fluorosilicate

    Applications of Sodium Fluorosilicate in Industrial Manufacturing

    Sodium fluorosilicate serves as an essential inorganic chemical in several industrial fields due to its high fluorine content and stable chemical structure. Our direct manufacturing approach ensures traceable quality for all sectors outlined below.

    1. Water Fluoridation Additives for Municipal Water Treatment

    Municipal water facilities use sodium fluorosilicate as a controlled fluoridation agent, improving public dental health by adjusting fluoride content in distributed water. Technicians dissolve and dose the material directly into water treatment systems using automated feeding units, closely monitoring concentration to prevent excess fluoride. The compound must meet drinking water grade purity levels and is submitted to batch analysis for trace heavy metals before delivery for water use.

    Industry compliance standards

    • ANSI/AWWA B702-22 (American Water Works Association Standard for Sodium Fluorosilicate)
    • US EPA National Primary Drinking Water Regulation
    • NSF/ANSI/CAN Standard 60 (Drinking Water Treatment Chemicals – Health Effects)
    • EN 12175:2013 (European Standard for Chemicals Used for Treatment of Water Intended for Human Consumption)

    Typical usage ratio

    • 2–10 mg/L, adjusted based on incoming water fluoride levels and required final concentration (typically 0.7–1.2 mg/L as fluoride ion in potable water)

    Downstream process integration

    • Dosed automatically into treated water streams after primary purification and prior to reservoir storage or distribution

    Final product types

    • Treated potable water supplied to residential, commercial, and industrial end users

    2. Opacifier for Ceramic and Porcelain Glaze Manufacturing

    Sodium fluorosilicate acts as a key opacifying agent in ceramic glaze compositions, optimizing translucency and surface finish. Mixing occurs in the mill with the glaze base materials. Accurate weighing and wet mixing steps ensure uniform distribution before high-temperature kiln processing. Strict control over its ratio prevents glaze defects and ensures compatibility with colorants. We produce grades with controlled particle size for stable suspension and reproducible gloss after firing.

    Industry compliance standards

    • ISO 13006 (Ceramic Tiles – Definitions, Classification, Characteristics, and Marking)
    • ASTM C21 (Standard Test Methods for Chemical Analysis of Ceramic Whiteware Materials)
    • RoHS Directive 2011/65/EU (when ceramics are intended for electronics)
    • QC system: ISO 9001:2015 for process management in ceramic factories

    Typical usage ratio

    • 1–5% by weight of total glaze composition; adjusted according to base formulation and required opacity or gloss

    Downstream process integration

    • Blended with feldspars, clays, and frits during glaze slurry preparation, then applied to biscuit ware and fired at 950–1250°C

    Final product types

    • Floor and wall tiles, sanitary ware glazes, decorative porcelain finishes

    3. Fluxing Agent in Foundry and Metallurgical Processes

    Foundry operations add sodium fluorosilicate to molding sand mixtures and slag formulations. In nonferrous metal casting, the compound regulates melting point and viscosity, enhancing slag separation and refining impurities. Engineers calculate addition based on the metal alloy and sand system used. Effective dosing improves surface finish of casts and reduces inclusions, which contributes to higher quality finished components.

    Industry compliance standards

    • ISO 4823 (Metal Foundries – Test Methods)
    • ASTM E801 (Standard Practice for Measuring Chemical Process Fluxes Used with Metals)
    • ISO 14001:2015 (Environmental management, applicable for foundry dust/gas emission control)

    Typical usage ratio

    • 0.2–2% by weight within foundry sand or flux mixtures, depending on casting mass and alloy system

    Downstream process integration

    • Added directly to sand mixers or molten metal fluxes before casting and molding, prior to pouring or core making operations

    Final product types

    • Aluminum and magnesium alloy castings, precision steel castings, automotive engine blocks

    4. Intermediate for Synthetic Cryolite Production in Aluminum Smelting

    Sodium fluorosilicate provides a primary fluoride source in the synthesis of synthetic cryolite (Na3AlF6), a critical flux for Hall-Héroult electrolytic aluminum production. Chemical plants feed precisely dosed material into reactors with alumina and sodium carbonate, followed by controlled thermal processing. Analytical QC assures minimal sulfate and heavy metal content to prevent contamination of smelted aluminum. We supply a consistent bulk grade to aluminum smelters and cryolite producers.

    Industry compliance standards

    • ISO 9001:2015 for bulk chemical manufacturing
    • ISO 12984:2018 (Aluminium fluoride for primary aluminium production — Methods of sampling and analysis)
    • GB/T 4291-2017 (Chinese standard for cryolite)

    Typical usage ratio

    • Stoichiometric ratio based on target Na3AlF6 yield; typically 0.6–0.7 tons per ton of cryolite produced, adjusted for purity

    Downstream process integration

    • Fed to batch reactors along with alumina raw material during cryolite synthesis, then calcined and granulated before downstream transport

    Final product types

    • Synthetic cryolite used in aluminum electrolysis cells, secondary aluminum refining agents

    5. Additive in Specialty Glass Manufacturing

    Sodium fluorosilicate functions as a key additive in the manufacture of opal and milky glass, where it induces controlled phase separation for unique light-diffusing effects. It is integrated during the batch mixing step with silica sand and alkali sources, ahead of high-temperature melting. Precision dosing is critical: excessive fluoride results in haze, while low addition leads to transparency loss. Our production ensures consistent granule quality compatible with pneumatic feeding to glass furnaces.

    Industry compliance standards

    • EN 572-1 (Glass in Building – Basic Soda Lime Silicate Glass Products – Definitions and General Physical and Mechanical Properties)
    • ASTM C1036 (Standard Specification for Flat Glass)
    • ISO 9001:2015 applied in glass batch compounding

    Typical usage ratio

    • 0.1–0.9% by weight in soda-lime or borosilicate glass batches, determined by the degree of opalization desired

    Downstream process integration

    • Fed continuously into glass melting tanks with other batch constituents, then refined and formed into sheets or wares at 1400–1600°C

    Final product types

    • Opal diffusing lighting covers, milky glass bottles, decorative bulb envelopes

    6. Source of Fluorosilicate for Synthetic Fluorine Chemicals

    Sodium fluorosilicate is processed by chemical synthesis plants as a raw material for hydrofluoric acid and fluorosilicate salts production. Process engineers dissolve and react it with concentrated sulfuric acid or calcium chloride under defined conditions. Strict quality control of impurities such as arsenic, lead, and insolubles is essential to downstream product quality, especially for electronics and pharmaceutical intermediates. Our material’s batch-to-batch consistency supports continuous production line operation.

    Industry compliance standards

    • ISO 9001:2015 for quality management
    • GB/T 11217-2015 (Chinese standard for hydrofluoric acid production)
    • REACH Regulation (EC) No 1907/2006 for hazardous chemicals in the EU

    Typical usage ratio

    • Stoichiometric use depends on targeted fluorine content; typically 1:0.9–1 molar ratio with sulfuric acid for hydrofluoric acid generation

    Downstream process integration

    • Charged to reactors as a solid or aqueous solution, followed by acidulation, extraction of HF gas, or precipitation of fluorosilicate derivatives

    Final product types

    • Hydrofluoric acid, potassium fluorosilicate, magnesium fluorosilicate, fluorosilicate-based etchants
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    Email: admin@ascent-chem.com

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    Certification & Compliance
    More Introduction

    Sodium Fluorosilicate: Our Manufacturing Perspective

    Introduction to Sodium Fluorosilicate

    Every batch of sodium fluorosilicate that leaves our facility represents years of practical experience and a close understanding of industrial needs. We witness its entire journey, starting from raw mineral reagents through careful chemical synthesis and thorough quality checks, until it heads out to industries that depend on consistent, reliable materials. Our model of sodium fluorosilicate, shaped by industry feedback, reflects clarity in crystalline form, predictable solubility, and a purity standard that minimizes contamination in downstream applications.

    Practicality drives our decisions. Over countless production cycles, we ensure the product holds low moisture content and uniform particle size—two elements that directly impact how our customers use the material in their factories. For many users, whether in glass manufacturing, ceramics, metal surface treatment, or water fluoridation, it matters more that the powder does not cake or clump in storage, and runs through feeders with little downtime. This reliability comes not from chance, but from a direct control over raw material sourcing, process temperature, and a drying technique honed by actual experience on the production floor.

    From Raw Material to Finished Product

    Sodium fluorosilicate emerges from a controlled reaction between hydrofluorosilicic acid and sodium chloride. In our line, batch timing and pH adjustment stand as the highest priorities. It can be easy to overlook how much minor deviations affect the final result. For example, if the acid is too diluted or if the sodium source contains too many impurities, the byproducts will raise sulfate or chloride traces, which may cause issues later in glass formulations or ceramic glazing. Hands-on supervision and integrated sensors allow us to monitor key variables, reduce off-spec production, and keep impurity levels consistently low—measured frequently to prevent problems before they reach customers.

    Finished sodium fluorosilicate often comes as a white powder or crystalline mass. The difference here is not decorative—it goes right to how the product flows, dissolves, and interacts in various uses. Some customers ask for slightly coarser crystals, which handle better in open bins and help keep dust generation under control. To meet these needs, we regularly screen for different particle size distributions, using gravity-fed classifiers and shaking screens. We see the difference in customer feedback: fewer complaints over dust, better functioning feeders, and cleaner work environments.

    Application in Glass, Ceramics, and Enamels

    Glass manufacturers value sodium fluorosilicate for the way it supports the introduction of fluoride ions into the melt, modifying optical and mechanical properties. Throughout hundreds of tons processed, we notice even small potassium or calcium impurities in the additive can lead to phase separation, bubbles, or devitrification in specialty glasses. It takes precise manufacturing practice to limit contamination and maximize sodium fluorosilicate’s benefit in clarifying glass, raising its chemical durability, and tuning its refractive index.

    Ceramics and enamel producers use this compound as a flux. The effectiveness of sodium fluorosilicate in reducing firing temperatures, improving glaze finish, or promoting color development relies on both chemical purity and crystal structure. In our plant, we analyze samples from each batch for both free-flowing consistency and residual moisture content. Even a little added moisture may cause unexpected storage issues or affect batching accuracy, which is why we invest in closed-system drying and dedicated storage silos. Producers have told us they appreciate this attention to practical matters—less time wasted on reworking clumps and more predictable product performance in kilns and spray booths.

    Metal Surface Treatment and Water Fluoridation

    Sodium fluorosilicate plays a vital role in metal finishing, particularly in aluminum and steel surface treatments. Over the years, we've found that batch-to-batch reproducibility in purity can mean the difference between a smooth, corrosion-resistant finish and costly rework. Our technicians personally calibrate feeder systems and review each blend before sending it out, aiming to keep grit, trace metals, and fines within specified limits. In metal industries, poorly controlled sodium fluorosilicate can lead to uneven etching or surface pits, hurting yield rates. With our in-house lab, we back our product with direct, traceable elemental analysis, and we adjust our process when a trend shows up—never letting a full production run go to waste.

    In municipal water treatment, sodium fluorosilicate serves as a key agent for fluoridation. Safety and soluble purity sit at the center here. Plants rely on low-lead, low-arsenic grades, knowing every gram goes directly into potable water. For this application, we triple-check our removal processes for potential toxins, and we maintain records on not just batch origins, but also on every filter replacement and equipment cleaning. By taking ownership of these steps in our plant, we offer reassurance no third-party supplier can match. Plants and municipalities choosing direct purchase from chemical manufacturers benefit by having a single responsible source, instead of working through intermediaries who may not know the difference between a test calibration and a haulage record.

    How Our Sodium Fluorosilicate Differs from Other Products

    Over the years, we've compared our sodium fluorosilicate to numerous samples from other regions and suppliers. Real-world testing has showed that not all versions deliver the same flow characteristics or solubility. One particular insight stands out from our kilns: products with higher silica residues created stubborn crusts in mixing hoppers, slowing production lines. We addressed this through upstream monitoring and selective precipitation steps, reducing process breakdowns for our partners.

    Some forms in the market offer higher bulk densities or lower dusting tendencies. We found these differences come from both the source of starting reagents and the exact drying regime. Our product focuses on cleanliness first, then on bulk handling properties. There are many sodium fluorosilicate products that promise ‘ultra high purity’; from our experience, purity by itself can mean little unless tied to consistent, operator-friendly handling. We see that customers appreciate materials that pour as expected, don’t gum up augers, and blend rapidly with other powdered ingredients.

    Some suppliers dilute specifications, selling lower grades under the generic name. We hold the line with our product, targeting the food safety and glass industry specs—regardless of use—while sharing third-party lab data as proof. This maintains trust over time. Our plant is run by people who remember which batch led to equipment jams or feedback about unexpected caking. Every improvement reflects direct field learning, not just paper specifications or generic phrases copied from textbooks.

    Safety and Handling Experience

    Sodium fluorosilicate calls for careful respect. In our facility, every operator handles it according to protocols developed from incidents and near-misses learned the hard way. When loading powders into silos, oversized dust collectors prevent exposure, and our staff monitor air levels and skin contact, since both fluoride and silica can become occupational hazards. Facilities that don’t treat this step seriously see higher turnover and more sick days—something we identified after working with customers who switched to us after problems with uncontrolled dust from lower-grade suppliers.

    Safe storage, especially in humid environments, takes more than a standard drum with a plastic liner. We use double-lined, moisture-resistant bags with sealed seams and rotate stock to minimize hardening in the warehouse. This control reduces not only spoilage but also processing headaches for users downstream. Customers with high-throughput feed systems often comment on reduced maintenance after switching, prompting more careful engineering on our part to meet these expectations.

    Emergency precautions require first-hand attention, not just reliance on standard messaging. Our emphasis has been on site tours, direct training, and real-world spill simulations. We discovered early that clear instruction on sodium fluorosilicate’s interaction with acids and water helps not just our team but also those at customer sites. Our technical staff regularly field questions on best-practice handling, and we answer based on our direct encounters with mixing line upsets, not just textbook hazards.

    Environmental Considerations

    Runoff, dust, and safe disposal demand as much engineering as synthesis. Through the years, we’ve installed dedicated containment berms and improved bagging lines after noticing increased surface residues outside the production hall. Environmental audits drive real habit change, not PR statements. By measuring local soil and water fluoride levels around our facility, we spot leaks before they turn into complaints and fines. In comparison, suppliers without local accountability often wait until a serious event forces a process shutdown.

    We recycle rinse water from production and run all exhausted air streams through multi-stage scrubbing, aiming to catch both fluoride gases and particulate. Directly controlling these streams prevents issues in surrounding communities. Our team also pursues long-term partnerships with certified disposal firms for filter cake and spent bags, with full manifest traceability. Our day-to-day work teaches that environmental priority saves on long-term liability, an experience that contrasts with some of the old practices in the industry where cost and speed overrode consideration for legacy or nearby ecosystems.

    Challenges in the Sodium Fluorosilicate Market

    New environmental regulations have changed how sodium fluorosilicate can be made, moved, and used, especially for water and glass customers. We often receive feedback that stricter heavy-metal limits strain the supply, especially since not every ore source meets modern requirements. Our approach stays practical: we diversify raw material buying, build multiple filtration and purification steps, and maintain documentation for every lot of raw input. By holding raw inventory, we buffer our partners from short-term market swings.

    Pricing pressures come and go, driven by natural gas costs, raw mineral pricing, and transport volatility. We’ve mitigated shocks not through cutting corners but through process efficiency—recovering waste heat, using more energy-responsive driers, and arranging direct shipping containers to customers. Customers who depend on guaranteed supply have helped shape our logistics, and together we solve bottlenecks faster than waiting for a third party or logistics aggregator.

    The other ongoing challenge comes from misinformation or careless substitution in the market. Over the years, we've seen products adulterated with soda ash or with higher calcium content, particularly from low-cost regions. These find their way into the supply chain, sometimes only discovered after a process upsets customers’ lines. By offering comprehensive lot analysis and welcoming plant visits, we support a transparent business relationship; in return, customers share more about the end process, allowing us to anticipate needs before they become urgent.

    Supporting Technical Innovation

    Some of the most rewarding work comes from collaborating with end users on new applications or process changes. Glass and ceramics teams often approach us with questions about compatibility with new fluxes, altered firing curves, or tighter batch control. Our in-house lab replicates these processes, sometimes pushing product boundaries to deliver a custom blend or improved flow aid. Such projects go beyond specifications, relying on dialogue between chemists and engineers to iterate, validate, and adapt in real time.

    We also respond to growing demand from industries using sodium fluorosilicate for specialized synthesis: phosphor production, silicon-based materials, or industrial catalysis. Our direct access to the manufacturing floor allows many tweaks—switching drying stages, shifting crystal morphology, or preparing tightly-sieved micropowders—for specific customer requirements. This flexibility comes from owning every process step, not from handing off batches to a toll producer or relying on intermediate brokers.

    Our technical team values direct feedback: upsets during bulk transfer, complaints about dusting, or requests for special grinding are logged and feed into training and capital investment. Such a cycle of continuous improvement only happens because of the close relationship between operations, quality assurance, and the visiting engineers who trust us to adapt batch characteristics for their unique plant needs. We hold open days, encourage trial runs with pilot batches, and invest in extra testing not required by commodity contracts. Customers with high-value downstream applications depend on this level of partnership, not only for the quality but also for troubleshooting and upskilling their staff on site.

    Industry Trends and Observations from a Manufacturer’s Viewpoint

    Over the past decade, demand for sodium fluorosilicate has shifted with the global economy, changes in environmental law, and trends in end-market product innovation. As a manufacturer, we notice these shifts not just in sales numbers, but in requests for different sizes, grades, and packaging. The move toward automated handling and bulk delivery has pushed us to design packaging with easier discharge features—lessening ergonomic risk for users and reducing package waste. Switching to fully recyclable liners came from pressure by key clients looking to lower their production footprint, and from our own teams managing outgoing waste.

    Another observable shift: as fluorinated compounds garner more regulatory scrutiny, customers demand direct statements and proof of chemical stewardship. No longer content with generic ‘meets-spec’ notes, more buyers seek batch-level quality data, chain-of-custody documentation, and precise breakdowns of fluoride, silicate, and heavy metals. We meet these needs by opening our internal lab records and welcoming audits by third-party inspectors, learning from the process rather than treating it as a hassle.

    We’ve also adjusted to the rise of stricter workplace safety and product stewardship expectations. Customers, especially those operating international plants, demand ISO-level documentation and demonstrated operator training. As a direct producer, we coordinate with their environmental health and safety teams, going through site-specific risk assessments and helping update procedures to ensure safe transfer, dosing, and storage. In the event of an incident, our technical team is ready to travel, diagnose, and recommend controls—a service we see less often from non-manufacturing suppliers.

    The COVID-19 pandemic and subsequent supply chain pressures highlighted the value of direct supply relationships. During shortages, raw stock held at our plant made the difference for critical customers—allowing uninterrupted production for municipal waterworks, glass, and ceramics users while spot-market sellers ran dry. Through rigorous procurement and scheduled maintenance, we sustained output even with quarantined staff and border delays. These real events underline the benefit of vertical integration and direct relationships between manufacturer and client, contrasting with the experience of those who had to scramble due to their reliance on just-in-time trading partners.

    Looking Ahead: Evolving Customer Needs and Product Development

    The landscape for sodium fluorosilicate continues to develop. As new technologies emerge in glass, electronics, and environmental management, we adjust both process and product. Our focus remains practical: lower-dust grades, faster-dissolving powders, and even food-grade versions with predictive trace element levels. We engage in joint pilot projects with advanced customers, integrating on-site feedback about pelletizing, blending, or bulk unloading, iterating not just for cost but for real compatibility with changing plant equipment.

    New end uses arise with surprising frequency. Research into rare-earth recovery, new fluoride-based batteries, and advanced ceramics all benefit from consistent, high-purity sodium fluorosilicate. Our R&D team looks beyond today’s bulk chemistry, evaluating possibilities for nano-sized crystals or surface-modified powders tailored to novel processes. These projects arise through conversations with academic, corporate, and government partners, not just internal brainstorming. Such partnerships generate real information exchange, from which new product concepts evolve.

    Direct lines of communication between our production, R&D, and customer teams provide timely feedback loops unmatched in more fragmented supply chains. This in-house approach lets us anticipate operational trends—such as stricter food contact rules or greater demand for pharmaceutical precursors. Where the market asks for rapid documentation, or custom adjustments to particle size or impurity content, we can respond without third-party delays or miscommunication.

    With every ton produced, we learn a little more about what makes sodium fluorosilicate work better for each use. Our knack for tailoring the product emerges from trial, error, and listening to customers facing real problems in the field. No third-party textbook or marketing agency can replicate this kind of hands-on insight or commitment to responsible manufacturing. By staying close to both the shop floor and our users, we turn direct experience into products and services that meet the challenges of today and prepare us—and our customers—for the needs of tomorrow.

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