1. Product Overview of Potassium Tetrafluoroborate CAS 14075-53-7 (Potassium Borofluoride)

Potassium Tetrafluoroborate (KBF₄), also named Potassium Fluoborate, is an inorganic fluoroborate salt. It is stable under normal temperature and slightly soluble in cold water. It will decompose and release boron trifluoride when exposed to strong acids. It is widely applied as flux for metal welding, raw material for electroplating electrolyte, auxiliary agent for metallurgy and casting, as well as a basic feedstock for the preparation of boron trifluoride and various fluoroborate salts.

2. Basic Chemical Information

Product Name: Potassium Tetrafluoroborate

Aliases: Potassium Fluoborate, Potassium Borofluoride

CAS No.: 14075-53-7

EINECS No.: 237-928-2

Molecular Formula: BF4K

Molecular Weight: 125.90

Appearance: White crystalline fine powder

Odor: Odorless

Density: 2.505 g/cm³ (25℃)

Melting Point: 530℃ (decomposes)

3. Core Product Features

- Excellent fluxing performance for metal brazing and welding, capable of removing metal oxide slag effectively

- Stable crystal structure, low moisture absorption, easy to be evenly blended in industrial formulations

- Raw material for manufacturing boron trifluoride and other fluoroborate salts

- Good compatibility with electroplating bath systems for alloy electroplating

4. Main Applications

Welding & Brazing Industry: Soldering flux for welding stainless steel, silver and copper alloys

Electroplating Industry: Additive for chromium plating and lead-tin alloy electroplating baths; etching agent for aluminium alloys

Metallurgy & Casting: Raw material for Al-Ti-B grain refiners; mould material for magnesium and aluminium casting

Fine Chemicals: Starting material for synthesizing boron trifluoride complexes

Abrasive Materials: Filler for resin-bonded abrasive grinding wheels

5. Typical Specifications (Industrial Grade)

Assay: ≥98.0%

Chloride (Cl⁻): ≤0.10%

Sulfate (SO4)): ≤0.05%

Iron (Fe): ≤0.003%

Heavy Metals (Pb): ≤0.002%

Moisture: ≤0.30%

6. Packing & Storage

Packing: 25kg composite woven bag with PE inner liner.

Storage: Store in a cool, dry and ventilated warehouse; keep tightly sealed against moisture. Isolate from strong acids and strong alkalis.

Shelf Life: 24 months under proper sealed storage.

7. Safety & Transportation

UN 3260, Class 8 Corrosive Substance, Packing Group III.

Avoid inhalation of dust and direct contact with skin and eyes.

Corrosive boron fluoride gas will be generated upon contact with concentrated acids.