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Potassium tetrafluoroborate

Chemical Properties Application Preparative Methods
Potassium tetrafluoroborate
Potassium tetrafluoroborate
Chemical Name:
Potassium tetrafluoroborate
KBF4;Avogadrite;POTASSIUM FLUOBORATE;Potassium fluorobora;PotassiuM fluoroborat;POTASSIUM BOROFLUORIDE;boronpotassiumfluoride;POTASSIUM FLUOROBORATE;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
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 $49 2017-11-08 Buy
Sigma-Aldrich 455903 Potassium tetrafluoroborate ≥99.99% trace metals basis 14075-53-7 25g $127 2017-11-08 Buy
Alfa Aesar 11556 Potassium tetrafluoroborate, 99% min, typically >99.5% 14075-53-7 2kg $159 2017-11-08 Buy
Alfa Aesar 11556 Potassium tetrafluoroborate, 99% min, typically >99.5% 14075-53-7 500g $47.2 2017-11-08 Buy
Strem Chemicals 93-1951 Potassium tetrafluoroborate 14075-53-7 500g $51 2017-11-27 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.

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( 240)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan DaKen Chemical CO.,LTD.
+86-371-55531817 CHINA 22128 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20795 55
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32764 55
Hefei TNJ Chemical Industry Co.,Ltd.
86-0551-65418684 18949823763
86-0551-65418684 China 1428 55
J & K SCIENTIFIC LTD. 400-666-7788 +86-10-82848833
+86-10-82849933; China 96815 76
Meryer (Shanghai) Chemical Technology Co., Ltd. +86-(0)21-61259100(Shanghai) +86-(0)755-86170099(ShenZhen) +86-(0)10-62670440(Beijing)
+86-(0)21-61259102(Shanghai) +86-(0)755-86170066(ShenZhen) +86-(0)10-88580358(Beijing) China 40399 62
Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 China 30308 84
Energy Chemical 021-58432009 / 400-005-6266
021-58436166-800 China 44192 61
Shanghai Mintchem Development Co., Ltd 021 6845 0923
0086 20 8234 8082 China 38 68
Shanghai Science Bio-Pharmaceutical Co. Ltd. 021-57872719,13918702962/13482412995
021-57872719 QQ:1823739912 China 296 60

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