Potassium tetrafluoroborate
Potassium tetrafluoroborate (CAS: 14075-53-7), a white crystalline solid with the formula KBF4, is a valuable inorganic compound. It is known for its role as a fluxing agent and in the production of other boron compounds. This high-purity material is essential for applications in materials science, metallurgy, and specialized chemical synthesis, meeting the rigorous demands of research and industrial processes.
- IUPAC
- Potassium borofluoride

Fluxing Agent in Metallurgy
Potassium tetrafluoroborate serves as an effective flux in various metal processing applications. It aids in removing impurities and improving the fluidity of molten metals during casting and welding operations.
Component in Soldering Fluxes
It is incorporated into soldering flux formulations, particularly for aluminium and its alloys. Its presence facilitates better wetting and adhesion of solder to the base metal surfaces.
Precursor for Boron Compounds
This compound acts as a source of boron and fluorine in the synthesis of other specialized boron-containing chemicals and materials. Its reactivity allows for controlled introduction of these elements.
Materials Science Applications
Potassium tetrafluoroborate is utilized in the development and production of advanced materials. It may be employed in the synthesis of ceramics and glass compositions requiring specific properties imparted by boron and fluorine.
| Molecular weight | 125.90 |
|---|---|
| Linear formula | KBF4 |
| Assay | ≥99.99% trace metals basis |
| Form | solid |
| Density | 2.505 g/mL at 25 °C(lit.) |
| Melting point | 530 °C(lit.) |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Water hazard class (WGK, DE) | 3 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Potassium tetrafluoroborate used for?
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Potassium tetrafluoroborate is used as a fluxing agent in metallurgy, a component in soldering fluxes, a precursor for synthesizing other boron compounds, and in various materials science applications.
What is the CAS number and chemical formula for Potassium tetrafluoroborate?
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The CAS number for Potassium tetrafluoroborate is 14075-53-7, and its chemical formula is KBF4.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Potassium tetrafluoroborate with an assay of ≥99.99% on a trace metals basis. We do not represent this product as USP, BP, or EP grade.
What are the safety considerations for handling Potassium tetrafluoroborate?
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Potassium tetrafluoroborate is classified with GHS hazards. Appropriate personal protective equipment, including eyeshields and gloves, should be worn. A type N95 (US) or type P1 (EN143) respirator filter is recommended when handling.
How is Potassium tetrafluoroborate shipped by Tech Serve Solutions?
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Potassium tetrafluoroborate is carefully packed and exported by Tech Serve Solutions to ensure safe transit and compliance with all shipping regulations.
How can I request a quote or sample for Potassium tetrafluoroborate?
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To request a quote or a sample of Potassium tetrafluoroborate, please contact our sales department through our website or by phone.
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