Potassium hydrogen fluoride (KHF2)-Crystalline

Characteristic

 

Potassium bifluoride is the inorganic compound with the formula KHF₂. This colourless salt consists of the potassium cation and the bifluoride (HF²⁻) anion. 

Chemical formula: HF₂K

Molar mass: 78.103 g/mol

Appearance: colourless solid

Odor: slightly acidic

Density: 2.37 g/cm³

Melting point: 238.7 °C (461.7 °F; 511.8 K)

Boiling point: decomposes

Solubility in water:24.5 g/100 mL (0 °C);30.1 g/100mL (10 °C);39.2 g/100 mL (20 °C);114.0 g/100 mL (80 °C)

Solubility: soluble in ethanol

 

Application

 

Potassium hydrogen fluoride is widely used as an etchant in glass and cleaning products. It finds an important application in the synthesis of special optical glass viz. crown and crown flint glass and as a catalyst for polymerization. It is involved in the manufacturing of wood preservatives, soldering agents and brazing. It is also used in the manufacturing of organic and inorganic fluorine compounds.