Ammonium fluoride (NH4F)-Crystals

Characteristic

 

Ammonium fluoride is the inorganic compound with the formula NH4F. It crystallizes as small colourless prisms, having a sharp saline taste, and is highly soluble in water.




Chemical formula: NH4F

Molar mass: 7.037 g/mol

Appearance: White crystalline solid hygroscopic

Density: 1.009 g/cm3

Melting point: 100 °C (212 °F; 373 K) (decomposes)

Solubility in water: 83.5 g/100 ml (25 °C) 

Solubility: slightly soluble in alcohol, insoluble in liquid ammonia

Magnetic susceptibility (χ): -23.0•10−6 cm3/mol




Application

 

Ammonium fluoride is used for etching of glass, preservation of food, in printing textile, and as mothproofing agent. It is used in chemical analysis and in brewing. It is used in the synthesis of NaHoF4 and NaEuF4, which are important in solid state lasers as well as photoluminescence. The fluoride ion is used as a base and nucleophile in organic synthesis. Ammonium fluoride providee safe deprotection strategy for the tert-butyldimethylsilyl (TBS) group during RNA synthesis.