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Potassium tetrafluoroborate

Chemical Properties Application Preparative Methods
Potassium tetrafluoroborate
Potassium tetrafluoroborate structure
Chemical Name:
Potassium tetrafluoroborate
KBF4;Avogadrite;POTASSIUM FLUOBORATE;Potassium fluorobora;PotassiuM fluoroborat;POTASSIUM BOROFLUORIDE;POTASSIUM FLUOROBORATE;boronpotassiumfluoride;POTASSIUM BOROFULUORIDE;potassiumboridefluoride
Molecular Formula:
Formula Weight:
MOL File:

Potassium tetrafluoroborate Properties

Melting point:
530 °C(lit.)
2.505 g/mL at 25 °C(lit.)
refractive index 
Micro-Crystalline Powder
White to light gray
Water Solubility 
4.4 g/L (20 ºC)
Moisture Sensitive
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)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  Xi,C
Risk Statements  36/37/38-34
Safety Statements  37/39-26-45-36/37/39-24/25
RIDADR  3260
WGK Germany  1
RTECS  ED2800000
Hazard Note  Corrosive/Moisture Sensitive
HS Code  28269090
Signal word:
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H315 Causes skin irritation Skin corrosion/irritation Category 2 Warning P264, P280, P302+P352, P321,P332+P313, P362
H319 Causes serious eye irritation Serious eye damage/eye irritation Category 2A Warning P264, P280, P305+P351+P338,P337+P313P
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
Precautionary statements:
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.

Potassium tetrafluoroborate price More Price(9)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 278955 Potassium tetrafluoroborate 96% 14075-53-7 500g $48.4 2018-11-13 Buy
Sigma-Aldrich 455903 Potassium tetrafluoroborate ≥99.99% trace metals basis 14075-53-7 25g $120 2018-11-13 Buy
Alfa Aesar 011556 Potassium tetrafluoroborate, 99% min, typically >99.5% 14075-53-7 2kg $139 2018-11-16 Buy
Alfa Aesar 011556 Potassium tetrafluoroborate, 99% min, typically >99.5% 14075-53-7 500g $42.1 2018-11-16 Buy
Strem Chemicals 93-1951 Potassium tetrafluoroborate 14075-53-7 500g $51 2018-11-13 Buy

Potassium tetrafluoroborate Chemical Properties,Uses,Production

Chemical Properties

It appears as white powder or gelatinous crystals. It has hygroscopicity with bitter taste. It is slightly soluble in water and hot ethanol, insoluble in cold ethanol.


Preparative Methods

Fluoroboric acid-potassium hydroxide method:
Hydrofluoric acid and boric acid are sent into the reactor at a ratio of 25: 6.2 (weight ratio); the temperature does not exceed 40 ℃. The reaction continues for 6h. The prepared fluoroboric acid is fed to a neutralization tank and neutralized with a 5 mol/L potassium hydroxide under stirring and cooling (until the methyl orange is discolored). Precipitated potassium fluoroborate crystal is subject to centrifugal separation, washing and drying, obtaining the finished product of potassium fluoroborate. its
4HF + H3BO3 → HBF4 + 3H2O
HBF4 + KOH → KBF4 + H2O
Fluoroboric acid/potassium carbonate neutralization method: under the stirring of the coating container, apply the saturated potassium carbonate solution for neutralizing fluoroboric acid to until the methyl orange is discolored. The precipitated potassium fluoroborate is subject to centrifugal separation, washing and drying, obtaining the finished product of potassium fluoroborate. Its reaction is:
2HBF4 + K2CO3 → 2KBF4 + H2O + CO2 ↑

Chemical Properties

white odourlesss crystalline powder


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


Toxic by ingestion.

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.]

Potassium tetrafluoroborate Preparation Products And Raw materials

Raw materials

Preparation Products

Potassium tetrafluoroborate Suppliers

Global( 251)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan DaKen Chemical CO.,LTD.
+86-371-55531817 CHINA 21968 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20680 55
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32457 55
Hefei TNJ Chemical Industry Co.,Ltd.
86-0551-65418684 18949823763
86-0551-65418684 China 1730 55
Xiamen AmoyChem Co., Ltd
+86 (0)592-605 1114 CHINA 6374 58
Chemwill Asia Co.,Ltd.
86-21-51861608;;; CHINA 24001 58
Hubei Jusheng Technology Co.,Ltd.
86-188-71490254 CHINA 20095 58
Haihang Industry Co.,Ltd
+86 531 8582 1093 CHINA 4669 58
career henan chemical co
+86-371-86658258 CHINA 19923 58
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933; China 96815 76

View Lastest Price from Potassium tetrafluoroborate manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-12-20 Potassium tetrafluoroborate
US $1.00 / kg 1kg 95%-99% 100kg career henan chemical co

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