Characteristic

Gold(III) oxide (Au2O3) is the most stable oxide of gold. It is a red-brown, thermally unstable solid that decomposes at 160 °C. The hydrated form is weakly acidic and dissolves in concentrated alkali to form salts that are believed to contain the Au(OH)4− ion.

Chemical formula:Au₂O₃

Molar mass:441.93g/mol

Appearance:red-brown solid

Density:11.34 g/cm³ at 20 °C

Melting point:160 °C (320 °F; 433 K) (decomposes)

Solubility in water:insoluble in water, soluble in hydrochloric and nitric acid

Crystal structure:Orthorombic

Application

It is used in aerospace and electrochemical applications such as fuel cells in which they exhibit ionic conductivity. It acts as strong reducing agent in redox reactions.

Gold (III) Oxide-MSDS.pdf