Introduction：Basic information about Digold trioxide CAS 1303-58-8, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.
Digold trioxide Basic informationGeneral description Preparation
| Product Name: | Digold trioxide |
| Synonyms: | GOLD OXIDE;GOLD SESQUIOXIDE;Auric oxide;Gold(III) oxide hydrate;GoldoxideorangebrownpowderGoldgehalt;Auric hydroxide;Gold(III) oxide, 99.9%;Gold trioxide |
| CAS: | 1303-58-8 |
| MF: | Au2O3 |
| MW: | 441.93 |
| EINECS: | 215-122-1 |
| Product Categories: | chemical reaction,pharm,electronic,materials;metal oxide;Gold;Metal and Ceramic Science;Oxides;Industrial/Fine Chemicals |
| Mol File: | 1303-58-8.mol |
|
Digold trioxide Chemical Properties
| Melting point | 150°C |
| storage temp. | 2-8°C, protect from light, stored under nitrogen |
| 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. |
| crystal system | Nogata |
| Merck | 14,4524 |
| Space group | Fdd2 |
| Lattice constant | | a/nm | b/nm | c/nm | α/o | β/o | γ/o | V/nm3 | | 1.2827 | 1.052 | 0.3838 | 90 | 90 | 90 | 0.5179 |
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| InChI | InChI=1S/2Au.3O |
| InChIKey | KQXXODKTLDKCAM-UHFFFAOYSA-N |
| SMILES | O([Au]=O)[Au]=O |
| CAS DataBase Reference | 1303-58-8(CAS DataBase Reference) |
| EPA Substance Registry System | Gold oxide (Au2O3) (1303-58-8) |
Safety Information
| Hazard Codes | Xi |
| Risk Statements | 36/38 |
| Safety Statements | 26-36 |
| RIDADR | UN 3263 8/PG 3 |
| WGK Germany | 3 |
| TSCA | TSCA listed |
| HS Code | 2843300000 |
Digold trioxide Usage And Synthesis
| General description | Brown powder; decomposes slowly on exposure to sunlight or by heating at 150°C; begins to release oxygen at 110°C; fully decomposes to metallic gold at 250°C; insoluble in water; soluble in hydrochloric and concentrated nitric acids; also soluble in aqueous solutions of sodiumor potassium cyanide. |
| Preparation | Gold(III) oxide is prepared by heating gold(III) hydroxide, Au(OH)3 at 130 to 140°C:
|
| Chemical Properties | Brownish-black powder, decomposedby heat.Keep in dark bottle. Soluble in hydrochloricacid; insoluble in water. |
| Uses | 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. |
| Uses | Gold plating |
| 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.] |
Digold trioxide Preparation Products And Raw materials
