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China, Chinese Eco-Friendly Sodium Fluorosilicate for Wood and Timber Protection1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
Inorganic SaltFluorideSodium FluorosilicateSodium Fluorosilicate Powder
Hubei Chica Industrial Co., Ltd.
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Product Description Sodium Fluorosilicate (Na2SiF6) Product Description1. Product OverviewSodium Fluorosilicate (chemical formula: Na2SiF6) is an inorganic compound commonly appearing as a white crystalline powder or granules. It is well known for its chemical stability and excellent application performance. The product is odorless, moderately toxic, and corrosive. When heated to high temperatures, it decomposes into hydrogen fluoride (HF) and silicon dioxide (SiO2).Sodium Fluorosilicate has low solubility in water, slightly increasing with temperature, but it dissolves readily in acidic solutions. Its stability, controlled reactivity, and high fluorine content make it widely used in water treatment, ceramics, glass manufacturing, metallurgy, and chemical synthesis.As an important fluorine-containing raw material, Sodium Fluorosilicate is used in metal corrosion prevention, enamel production, ceramic glazing, glass etching, wood preservation, and water fluoridation. In water treatment, it serves as an economical fluoridation agent to help prevent dental caries. In ceramics, it enhances glaze acid-alkali resistance, gloss, and durability.2. Chemical & Physical PropertiesChemical Name: Sodium FluorosilicateMolecular Formula: Na2SiF6Molar Mass: 188.06 g/molCAS No.: 16893-85-9Appearance: White crystalline powder or granulesOdor: OdorlessDensity: 2.68 g/cm3Melting Point: ~500 oC (decomposes)Solubility: Slightly soluble in water; soluble in acidic solutionsStability: Stable under normal temperature and pressure; decomposes at high temperature releasing HFToxicity: Moderately toxic; avoid inhalation and ingestionThe compound features a tightly bound crystalline structure, giving it strong stability under neutral conditions. In acidic environments, it decomposes and releases hydrogen fluoride, requiring careful handling during storage, transport, and use.3. Manufacturing ProcessIndustrial Sodium Fluorosilicate is generally produced by reacting fluosilicic acid (H2SiF6) - obtained as a by-product from phosphate fertilizer production or prepared directly - with an alkaline agent such as sodium carbonate or sodium hydroxide. The typical process includes:Raw Material PreparationFluosilicic acid solutionAlkaline neutralizing agents (sodium carbonate or sodium hydroxide)Washing water and mother liquor recovery systemReactionThe fluosilicic acid solution is slowly mixed with an alkaline solution under controlled temperature and pH, producing precipitated Sodium Fluorosilicate crystals.Solid-Liquid SeparationThe crystalline product is separated from the mother liquor by filtration or sedimentation. The mother liquor is recycled to reduce costs.Washing & DryingThe crude product is washed several times to remove soluble impurities, then dried at low temperature to avoid decomposition.Crushing & PackagingDried Sodium Fluorosilicate is milled to the desired particle size and packaged per customer requirements.This process ensures high purity, stable quality, and cost-effectiveness.4. Typical Quality Specifications (Industrial Grade)ItemSpecificationNa2SiF6 Content≥ 98.0%Fluorine (F) Content60.0% - 61.0%Water Insolubles≤ 0.5%Free Acid (as H2SiF6)≤ 0.1%Chlorides (Cl-)≤ 0.05%Iron (Fe3+)≤ 0.02%Moisture≤ 0.3%AppearanceWhite powder/granulesCustom grades can be supplied according to different industry requirements for purity, particle size, and moisture content.5. Applications1. Water Treatment & Public HealthSodium Fluorosilicate is an efficient and economical water fluoridation agent. Adding appropriate amounts of fluoride to drinking water significantly reduces dental caries. Due to its stability, cost-effectiveness, and ease of use, it is widely adopted in municipal water treatment plants and rural centralized water supply systems.2. Ceramics & Glass IndustryIn ceramics, Sodium Fluorosilicate acts as a flux, lowering the melting point of glazes, enhancing gloss, transparency, and acid-alkali resistance. In glass etching, it serves as a key chemical to uniformly corrode the glass surface, creating a frosted effect.3. Metallurgy & Metal Surface TreatmentUsed as a corrosion inhibitor and surface treatment agent, Sodium Fluorosilicate improves metal corrosion resistance and adhesion properties. It is commonly applied in aluminum and steel pickling and passivation processes.4. Wood Preservation & Insect ControlSodium Fluorosilicate functions as a preservative and insecticide, effectively preventing wood decay, insect infestation, and mold growth, extending the service life of poles, railway sleepers, and storage planks.5. Chemical SynthesisAs a fluorine source, Sodium Fluorosilicate participates in the production of inorganic and organic fluorides in various chemical processes.6. Packaging & StoragePackaging: 25kg or 50kg woven polypropylene bags with polyethylene liners; jumbo bags available on request.Storage: Store in a cool, dry, well-ventilated area, away from acids and moisture.Shelf Life: 24 months under recommended storage conditions. 7. Transportation & SafetySodium Fluorosilicate is classified as a toxic chemical and must be transported according to hazardous goods regulations. Transport vehicles should be clean, dry, and protected from sun and rain. It must not be transported with acids, food, or feed. Handle with care to avoid packaging damage. Operators should wear dust masks, gloves, and safety goggles to prevent dust inhalation and skin contact. 8. Product AdvantagesHigh Purity & Low Impurities - Guaranteed Na2SiF6 content ≥ 98% with minimal contamination.Consistent Particle Size - Customizable to suit different industrial processes.Competitive Price - Direct factory supply with stable and cost-effective pricing.Reliable Supply Capacity - Large-scale production with ample inventory to meet bulk orders.Rich Export Experience - Supplied to multiple continents with full export licenses and hazardous goods handling capabilities. 9. Quality Control & CertificationsOur production facilities operate under a strict quality management system. From raw material procurement to final product inspection, every stage complies with ISO standards. Our laboratory is equipped with advanced analytical instruments such as atomic absorption spectrometers and ion chromatographs to ensure every batch meets or exceeds customer specifications. Third-party inspection reports (SGS, BV, CCIC) can be provided upon request. 10. Export Markets & Cooperation CasesOur Sodium Fluorosilicate products have been exported to Bangladesh, India, Vietnam, Egypt, Kenya, South Africa, Russia, Brazil, and more than 20 other countries and regions. We have established long-term partnerships with leading companies in water fluoridation, ceramic glazing, glass etching, and metal surface treatment industries. With stable quality, timely delivery, and professional after-sales service, we have earned an excellent reputation in the global market. ConclusionAs a vital fluorine-based chemical, Sodium Fluorosilicate enjoys stable and growing global demand. We are committed to supplying high-quality products and offering technical support to our customers worldwide. We warmly welcome partners from around the globe to discuss cooperation opportunities and achieve mutual benefits.
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