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Digold trioxide

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Products Intro: Product Name:Digold trioxide
CAS:1303-58-8
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Products Intro: Product Name:Gold(III) oxide, 99%
CAS:1303-58-8
Purity:99% Package:1g;5g
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Products Intro: Product Name:Digold trioxide
CAS:1303-58-8
Purity:99% HPLC Package:1Mg ; 5Mg;10Mg ;100Mg;250Mg ;500Mg ;1g;2.5g ;5g ;10g
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Products Intro: Product Name:Gold(III) oxide, PreMion|r, 99.99% (Metals basis), Au 88.6% Min
CAS:1303-58-8
Package:0.25g Remarks:012161
Company Name: Energy Chemical  
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Products Intro: Product Name:Digold trioxide
CAS:1303-58-8
Package:1g,250Mg,5g
Digold trioxide Basic information
General description Preparation
Product Name:Digold trioxide
Synonyms:GOLD OXIDE;GOLD SESQUIOXIDE;Auric oxide;Gold(III) oxide hydrate;GoldoxideorangebrownpowderGoldgehalt;Gold(III) oxide, 99.9%;Gold trioxide;Gold(III)oxide,99%
CAS:1303-58-8
MF:Au2O3
MW:441.93
EINECS:215-122-1
Product Categories:Industrial/Fine Chemicals;Gold;Metal and Ceramic Science;Oxides;metal oxide;chemical reaction,pharm,electronic,materials
Mol File:1303-58-8.mol
Digold trioxide Structure
Digold trioxide Chemical Properties
Melting point 150°C
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 Reference1303-58-8(CAS DataBase Reference)
EPA Substance Registry SystemGold 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 Yes
MSDS Information
ProviderLanguage
Digold trioxide English
SigmaAldrich English
ALFA English
Digold trioxide Usage And Synthesis
General descriptionBrown 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.
PreparationGold(III) oxide is prepared by heating gold(III) hydroxide, Au(OH)3 at 130 to 140°C:
Chemical PropertiesBrownish-black powder, decomposed by heat.Keep in dark bottle. Soluble in hydrochloric acid; insoluble in water.
UsesGold plating
Purification MethodsThe 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
Tag:Digold trioxide(1303-58-8) Related Product Information
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