Characteristic

 

Ammonium metavanadate is the inorganic compound with the formula NH₄VO₃. It is a white solid, although samples are often yellow owing to impurities of V₂O₅. It is an important intermediate in the purification of vanadium.

Chemical formula:NH₄VO₃

Molar mass:116.98 g/mol

Appearance:white

Density:2.326 g/cm³

Melting point:decomposes > 70 °C (158 °F; 343 K)

Boiling point:decomposes

Solubility:diethanolamine, ethanolamine

 

Application

 

Ammonium vanadium oxide is used as a catalyst in organic synthesis, and as an analytical reagent in laboratories. It is employed in the preparation of vanadate. It acts as a sensor for the determination of N-acetyltransferase activity in humans. Further, it finds use in dyes, varnishes, indelible inks, drier for paints, and in photography. With copper carbonate, it has been shown to enhance the catalytic activities. It is an environmental-friendly catalyst to prepare alfa-hydroxyphosphonate derivatives in high yield through the reaction of aryl/heteroaryl aldehydes with triethylphosphonate derivatives.