Sodium Silicofluoride
Chelora Chemicals supplies industrial-grade Sodium Silicofluoride (Sodium Fluorosilicate, Na2SiF6, CAS 16893-85-9), a white crystalline fluorosilicate salt used in municipal water fluoridation, as an additive in opal glass and vitreous enamel formulations, and as a laundry sour and wood preservative component. Export shipments move from Indonesia in moisture-controlled packaging suited to drum and container loading.
What Sodium Silicofluoride is, and why buyers source it
Sodium Silicofluoride provides a controlled, low-solubility fluoride source suited to applications where slow, metered fluoride release or a solid dosing format is preferred over more aggressive fluoride salts.
In municipal water fluoridation systems, Sodium Silicofluoride is dosed as a saturator-fed solution, delivering fluoride ion at controlled concentrations for dental health programmes.
In opal glass and vitreous enamel formulations, the compound contributes opacifying and flux properties, decomposing at processing temperatures to release fluoride that interacts with the glass matrix.
How Sodium Silicofluoride is made
An overview of the production route for orientation purposes. Our manufacturing partners' own process parameters and in-process controls are proprietary and are not disclosed beyond what is needed to interpret the certificate of analysis.
Sodium Silicofluoride is produced as a co-product of phosphoric acid and hydrofluoric acid manufacturing, where fluosilicic acid is neutralised with sodium chloride or sodium carbonate to precipitate the fluorosilicate salt.
Precipitation conditions, washing and drying are controlled to minimise residual free acid and deliver a consistent crystalline product suitable for precision dosing applications.
Industries and processes that use it
Sodium Silicofluoride serves water treatment, glass/ceramics and selected industrial preservation applications.
Water Fluoridation
Dosed via saturator systems in municipal water treatment to deliver controlled fluoride ion concentrations.
Opal Glass & Enamel
Opacifying and flux additive in glass and vitreous enamel formulations.
Wood Preservation
Component in selected wood preservative formulations for fungal and insect resistance.
Laundry Sour
Used historically as a laundry sour to neutralise residual alkalinity after bleaching.
How the molecule is typically carried forward
Sodium Silicofluoride releases fluoride ion gradually in aqueous systems and decomposes thermally in glass and ceramic processing.
Metered Dosing
Na2SiF6 is dissolved or metered into the water stream or formulation via saturator feed.
Gradual Fluoride Release
The compound dissolves or thermally decomposes, gradually releasing fluoride ion.
Incorporation
Fluoride ion is incorporated into the treated water or the glass/ceramic matrix.
Sodium Silicofluoride against other amines we supply
Sodium Silicofluoride is supplied alongside related fluoride and inorganic salt products.
| Product | CAS Number | Category | Notes |
|---|---|---|---|
| Sodium Silicofluoride | 16893-85-9 | Fluorosilicate salt | The product on this page — used in water fluoridation and glass/ceramics. |
| Potassium Fluoride | 7789-23-3 | Water-soluble fluoride salt | A more soluble fluoride source used in organic fluorination — see its product page. |
| Potassium Chloride | 7447-40-7 | Potassium halide salt | A related bulk inorganic salt — see its product page. |
| Sodium Sulphate | 7757-82-6 | Inorganic sulphate salt | Another high-volume sodium salt in our range — see its product page. |
Exact physical constants and purity specifications are confirmed per batch on the certificate of analysis — treat the notes above as a sourcing guide, not a specification sheet, for products other than Sodium Silicofluoride.
Safety classification at a glance
Based on GHS classification as commonly listed for this substance. This is a summary for orientation only — always work from the current safety data sheet supplied with your specific batch.
Toxic if swallowed.
Causes skin irritation.
Causes serious eye irritation.
May cause respiratory irritation.
Dust mask / respirator required.
Safety goggles required.
Gloves and protective clothing.
Dry, cool, well-ventilated area.
Sodium Silicofluoride is handled as a toxic-if-swallowed inorganic salt requiring dust control and standard PPE. Water treatment dosing follows regulated handling procedures given its use in potable water systems, and packing is designed to prevent dust generation during transit and transfer.
Keeping it on spec between delivery and use
General storage guidance for this grade. Site-specific storage rules, segregation requirements and re-test intervals should follow your own EHS procedures and the MSDS issued with your batch.
Store in sealed, moisture-resistant containers away from strong acids and incompatible materials. Keep dust generation to a minimum during handling and transfer.
How it ships from Indonesia
Standard packing and export terms for this product. Confirm exact figures against your order — they vary slightly by destination and quantity.
What travels with every batch
Specification is agreed before the purchase order, not discovered on arrival. Every shipment of Sodium Silicofluoride leaves with a documented, checkable paper trail.
Certificate of Analysis
Batch-wise assay (by titration/GC), colour and relevant physical constants, issued against the agreed specification so your QC team can check it, not just file it.
Safety Data Sheet
GHS-format SDS in English covering hazard classification, handling, storage, first-aid and spill response for the exact grade of Sodium Silicofluoride shipped.
Technical Data Sheet
Reference physical and chemical properties, recommended storage and typical applications, for internal circulation to your process or R&D teams.
Certificate of Origin
Confirms Indonesian origin for customs clearance and any preferential-duty claim at your destination port.
Dangerous Goods Declaration
UN packing group, classification and shipper's declaration prepared ahead of loading so documentation never holds up customs.
Third-Party Inspection
Independent pre-shipment inspection and re-sampling can be arranged on request, at your cost, for buyers who require it as a matter of policy.
Frequently asked questions
What buyers most often ask our sales desk about this grade.
01What is Sodium Silicofluoride used for?+
02Is Sodium Silicofluoride safe for drinking water treatment?+
03What purity does Chelora Chemicals supply?+
04How is Sodium Silicofluoride packed for export?+
05What is the difference between Sodium Silicofluoride and Sodium Fluoride?+
06Is Sodium Silicofluoride corrosive?+
07What is the typical lead time for export orders?+
08Does Chelora Chemicals provide a Certificate of Analysis?+
09What packaging sizes are available?+
10Can Sodium Silicofluoride be used in glass manufacturing?+
Need Sodium Silicofluoride on spec, on time?
Send us your required purity, quantity, packing preference and destination port. Our desk quotes most enquiries within one working day.