Tin(II) Fluoroborate, chemically known as Sn(BF4)2
Tin(II) fluoroborate (Sn(BF 4 ) 2 , CAS 13814-97-6) is a white, water-soluble crystalline tin salt that forms stable aqueous solutions. It is used as a tin-ion source in high-speed tin electroplating, in PCB solderability treatment, and as a fluxing agent in glass and ceramic manufacturing.
Product Overview
Tin(II) fluoroborate, also called stannous tetrafluoroborate (Sn(BF 4 ) 2 , CAS 13814-97-6, EINECS 237-487-6), is an inorganic tin(II) salt with a molecular weight of 292.32. It is a white crystalline solid, soluble in water and forming stable aqueous solutions, with a density of 1.67 g/mL at 25°C; it decomposes above about 130°C. It is used mainly as a source of tin ions in fluoroborate tin-plating baths, in the solderability treatment of printed circuit boards, and as a fluxing agent in glass and ceramics.
| CAS No. | 13814-97-6 |
| EINECS | 237-487-6 |
| Molecular Formula | Sn(BF 4 ) 2 |
| Molecular weight | 292.32 |
| Appearance | White crystalline solid |
| Density | 1.67 g/mL (25°C) |
| Solubility | Soluble in water, forming stable aqueous solutions |
| Melting point | Above about 130°C (decomposes) |
Key Benefits
- Readily soluble tin-ion source for fluoroborate plating baths
- Forms stable aqueous solutions
- Supports high-speed tin electroplating
- Used in PCB solderability treatment
- Fluxing agent for glass and ceramics
Applications
- Electroplating — source of tin ions in fluoroborate tin-plating processes for smooth, uniform coatings
- Electronics — solderability preservative and treatment for printed circuit boards
- Glass and ceramics — fluxing agent that lowers the melting point of materials
- Metal finishing — tin-based surface treatment formulations
Safety, Packing & Storage
Tin(II) fluoroborate is corrosive to metals, acutely toxic orally, a skin sensitizer and an eye irritant. Avoid skin and eye contact, wear suitable protective equipment and seek medical attention after contact. Keep it tightly closed in a cool, dry place in a corrosion-resistant container with a resistant inner liner, and dispose of waste through approved facilities.
FAQ
Q: What is tin(II) fluoroborate used for?
A: High-speed tin electroplating, PCB solderability treatment, and glass and ceramic fluxing.
Q: What are its CAS number and molecular formula?
A: CAS 13814-97-6, molecular formula Sn(BF4)2.
Q: How soluble is it?
A: Soluble in water, where it forms stable aqueous solutions.
Q: What safety precautions apply?
A: It is corrosive and a skin sensitizer; wear PPE and store it in corrosion-resistant, tightly closed containers.