Digold trioxide
- CAS NO.：1303-58-8
- Empirical Formula: Au2O3
- Molecular Weight: 441.93
- MDL number: MFCD00014173
- EINECS: 215-122-1
- SAFETY DATA SHEET (SDS)
- Update Date: 2025-07-16 09:55:29
What is Digold trioxide?
Chemical properties
Brownish-black powder, decomposed by heat.Keep in dark bottle. Soluble in hydrochloric acid; insoluble in water.
The Uses of Digold trioxide
Gold plating
The Uses of Digold trioxide
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.
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.]
Properties of Digold trioxide
| Melting point: | 150°C |
| solubility | insoluble in H2O; soluble in acid solutions |
| form | Powder |
| color | Brown |
| Water Solubility | Insoluble in water. Soluble in HCl, HNO<sub>3</sub> and in NaCN solution. |
| Merck | 14,4524 |
| CAS DataBase Reference | 1303-58-8(CAS DataBase Reference) |
| EPA Substance Registry System | Gold oxide (Au2O3) (1303-58-8) |
Safety information for Digold trioxide
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation |
| Precautionary Statement Codes |
P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P321:Specific treatment (see … on this label). P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P332+P313:IF SKIN irritation occurs: Get medical advice/attention. P337+P313:IF eye irritation persists: Get medical advice/attention. |
Computed Descriptors for Digold trioxide
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