1303-58-8 Usage
Description
Digold trioxide, also known as triauric oxide or triauric acid, is a brown powder that decomposes slowly when exposed to sunlight or heated at 150°C. It begins to release oxygen at 110°C and fully decomposes into metallic gold at 250°C. Digold trioxide is insoluble in water but soluble in hydrochloric and concentrated nitric acids, as well as in aqueous solutions of sodium or potassium cyanide. It is a brownish-black powder that should be stored in a dark bottle due to its decomposition by heat.
Uses
Used in Aerospace Applications:
Digold trioxide is used as a material in aerospace applications for its ionic conductivity properties, making it suitable for use in fuel cells and other electrochemical systems.
Used in Electrochemical Applications:
In the electrochemical industry, Digold trioxide is utilized as a strong reducing agent in redox reactions, contributing to its effectiveness in various electrochemical processes.
Used in Gold Plating:
Digold trioxide is employed in the gold plating industry due to its ability to fully decompose into metallic gold at 250°C. This property makes it an ideal candidate for coating and plating applications, where a thin layer of gold is required on various surfaces.
Preparation
Gold(III) oxide is prepared by heating gold(III) hydroxide, Au(OH)3 at 130 to 140°C:
Purification Methods
The most probable impurities are SO4and Cl-ions. Dissolve it in strong boiling KOH solution (ca 5M) and precipitate (care) with excess of 3N H2SO4. Then shake and centrifuge, resuspend in H2O and repeat the washing several times until free from SO4 and Cl ions. This gives a wet oxide which is dried in air, but decomposes to free gold in sunlight. It is advisable to keep it wet as it decomposes on drying (analyse wet sample). Store it away from light in the presence of H2O vapour. It evolves O2 at 110o. It is insoluble in H2O but soluble in HCl and conc HNO3. [Roseveare & Buehrer J Am Chem Soc 49 1221 1927.]
Check Digit Verification of cas no
The CAS Registry Mumber 1303-58-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,3,0 and 3 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 1303-58:
(6*1)+(5*3)+(4*0)+(3*3)+(2*5)+(1*8)=48
48 % 10 = 8
So 1303-58-8 is a valid CAS Registry Number.
InChI:InChI=1/2Au.3O/rAu2O3/c3-1-5-2-4
