Characteristic

 

Tungstic acid refers to hydrated forms of tungsten trioxide, WO₃. The solid-state structure of WO₃·H₂O consists of layers of octahedrally coordinated WO₅(H₂O) units where 4 vertices are shared. The dihydrate has the same layer structure with the extra H₂O molecule intercalated.The monohydrate is a yellow solid and insoluble in water. The classical name for this acid is 'acid of wolfram'. Salts of tungstic acid are tungstates.

Chemical formula:H₂WO₄

Molar mass:249.853 g/mol

Appearance:yellow powder

Density:5.59 g/cm³

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

Boiling point:1,473 °C (2,683 °F; 1,746 K)

Solubility in water:insoluble

Solubility:soluble in HF, ammonia;slightly soluble in ethanol

  

Application

 

Applied as flavoring agent and fragrance.