Potassium tetrafluoroborate

Synonym(s):Potassium borofluoride

CAS NO.：14075-53-7
Empirical Formula: BF4K
Molecular Weight: 125.9
MDL number: MFCD00011395
EINECS: 237-928-2
SAFETY DATA SHEET (SDS)
Update Date: 2025-12-11 08:41:34

What is Potassium tetrafluoroborate?

Chemical properties

white odourlesss crystalline powder

The Uses of Potassium tetrafluoroborate

Potassium tetrafluoroborate is used as an active filler in the preparation of resin-bonded abrasives. It is also used for extraction, refining and processing of metals in the chemical industry. It finds application as additive in alloying industry and welding agent. Further, it is used in the production of fluxing agents for brazing and soldering.

The Uses of Potassium tetrafluoroborate

Has been proposed as a flux for soldering and brazing; filler in resin-bonded grinding wheels.

Hazard

Toxic by ingestion.

Flammability and Explosibility

Not classified

Safety Profile

Poison by intraperitoneal route. When heated to decomposition it emits very toxic fumes of F, K2O, and BOx. Used in sand casting of aluminum and magnesium, grinding, and in resinoid grindmg wheels. See also FLUORIDES and BORON COMPOUNDS.

Purification Methods

Crystallise it from H2O (solubility% (temperature): 0.3 (3o), 0.45 (20o), 1.4 (40o), 6.27 (100o), and dry it under vacuum. It is a non-hygroscopic salt. A 10% solution is transparent blue at 100o, green at 90o and yellow at 60o. [V.rlander et al. Chem Ber 65 535 1932, Kwasnik in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 223 1963.]

Properties of Potassium tetrafluoroborate

Melting point:	530 °C(lit.)
Density	2.505 g/mL at 25 °C(lit.)
refractive index	1.3245
storage temp.	Sealed in dry,Room Temperature
solubility	slightly soluble in ethanol
form	Micro-Crystalline Powder
color	White to light gray
Odor	wh. odorless cryst.
Water Solubility	4.4 g/L (20 ºC)
Sensitive	Moisture Sensitive
Merck	14,7686
Exposure limits	ACGIH: TWA 2.5 mg/m3 NIOSH: IDLH 250 mg/m3; TWA 2.5 mg/m3
Stability:	Stable. May decompose on exposure to water or moisture. Incompatible with metals.
CAS DataBase Reference	14075-53-7(CAS DataBase Reference)
NIST Chemistry Reference	Potassium tetrafluoroborate(14075-53-7)
EPA Substance Registry System	Borate(1-), tetrafluoro-, potassium (14075-53-7)

Safety information for Potassium tetrafluoroborate

Signal word	Danger
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P405:Store locked up.